So here's the update that has been pending for more than a year. To everyone reading and following this thread, apologies for the delay.
Since May last year, a lot of things have changed. I usually don't ride any kind of two-wheelers in the rains (unless absolutely necessary) so my RR310 had its runs only when the roads had dried up for a few odd days in those three months.
Come October, it was time for the third service (and first paid service at that). Work on the bike was not much and I don't recollect having many complaints to be worked on excluding some noise from the front disc (brake pads needed some cleaning I guess) and a screw that wasn't fixed properly near the oil filter.
Save for the above, the service included only chain clean and lubrication (I carry my own set for each service), a general check-up to see if everything was fine and a software update (if any).
I was in and out in about an hour or so and the final bill came to 950 (attached below). I'm not entirely sure if this is a fair amount or expensive considering not much work was to be done and 900 bucks were charged for labour. Opinions on this are most welcome.
I happened to take a family (yes, vehicle family) photo on the occasion of Dussehra. Clockwise, my bone-stock 2002 Type-II Honda City DX (now sold), 2017 Hyundai Creta E+, 2018 TVS Apache RR310 and a friend's 2012 Honda Dio (kind of restoration project at the time). Below that image is a picture of the scooter after bringing it back to stock condition, making it mechanically sound and presentable in looks.
Coming back to the RR310, I had plans to install a few aftermarket accessories and had been in touch with a few brands for the same but the quality and designs of most didn't match what I was looking for. Finally I got in touch with Sagar from Mototrendz, Thane. He also runs the Rider's Laundry, a service that offers washing for riding gear, and that's how I got in touch with him. I liked the quality of the frame sliders he had designed for a few bikes and placed an order for a set for my bike. A week later, they were ready and I went to get them installed. The right side unit was fixed rather quickly but the left side of the fairing could not be accessed as one of the screws was tightened more than recommended and there was a risk of it breaking. Sagar asked me not to take that risk and get this one opened and installed at the SVC which I got done a few days later. I paid Rs 3,200 for the frame sliders, got a decent discount as mine was the first one designed by his brand for the Apache RR310. The nameplate on the frame sliders though did not have a good finish. Sagar didn't seem to be helpful to rectify it or get it changed so I got it wrapped (with a sticker) of the prancing horse of the TVS logo in red. This solved the issue, gave it a better look while also giving a customised look, all for Rs 20. Here are a few pics of the bike after the frame sliders were installed:

The frame sliders after I got them home

The un-even and unfinished look on the nameplate

The nameplate after installing the stickers
Attachment 2010660 
A random shot of the bike after the frame sliders were installed

Top view of the sliders, how they look when you're on the rider's seat
Since I landed a new job late last year, I began using the Apache as my daily driver, apart from the occasional weekend rides. A daily run of 50 kms (to and fro Thane-Vashi) has seen the odometer pick some pace, currently standing at 12,xxx kms.
Exactly 2 years after she came into my life and on the eve of the lockdown, I got her another accessory for her birthday in the form of traction pads/tank grips (or whatever else you may call them). I purchased these from Sagar again as I liked the quality and costing (Rs 500 for the set). In comparison, Autologue design sells the exact same stuff for more than double the price. The installation barely took a few minutes though I'm yet to get a grip (pun intended) on them as I haven't ridden the bike much after the lockdown was imposed.

Close-up pictures of the tank-pads

Overall looks of the bike after installing the tank-grips
The fourth service (a major one at that, including replacement of spark plugs, brake oil etc.) was scheduled for the fourth week of March but had to be postponed, again, due to the lockdown. Now we're almost at the end of May and there's no sight or chance of the bike getting serviced anytime soon. Although the SVC is open, local cops are not allowing movement till Panvel and even if they do, the engineer who services the 310 is unavailable as his residence has come under a containment zone. So for the next three months too, the bike will remain more or less idle (irrespective of whether the lockdown is lifted or not) and the service will be carried out once the rains subside (sometime in September/October). This service is an important one at that and I'm curious to know how much it will set me back by. Sadly, that update isn't coming up anytime soon.
Nonetheless, it's been an overall satisfactory experience with my Apache RR310, I don't recollect facing any major issues since the last update. The fuel economy ranges between 28-35kmpl depending on my urge to pull that throttle. It's tough choosing between better FE and listening to that exhaust note on a higher pitch. Summing up this post with a few images below.

Sharing the frame with another red beauty during the Mumbai-Pune Team-BHP meet in January 2020

Took these photos during a trip to Malshej ghat

One early morning en route Mumbai, somewhere between Pune and Lonavala

The keychain says it all!

During a random stroll in the city

Cockpit view

One of my favourite angles

Seen here with the mighty 14R, the same one seen in the opening post of the thread.
P.S. She's got some Brock's Slip-ons and a whole lot of accessories since the first post.

The last photo I took before the lockdown came into effect