Never is too late. But, if they update = someone use this camera.
Aside from no 4K video etc it feels like a thoroughly modern camera. The AF is good, the 24 megapixel sensor produces good raw files, the continuous shooting rate is pretty fast (though the buffer is small and can't shoot very frames in one blast), the design of the camera and layout and controls are very similar to the latest Nikon DSLRs.
Cameras don't age like software or phones, this is why I like them.
A 10 year old DSLR like the Nikon D7100 (I have one) is still a very modern camera and it'll be good for a few decades to come.
(Sadly this is why good companies like Nikon struggle financially, since there is no forceful upgrade treadmill unlike for phone companies. But as a consumer I absolutely love being able to buy something solid that'll work for decades.)
My first camera was a D3100 in 2010ish, which I recently sold to a friend of mine for $100 and they are still taking fantastic photos with it.
I have a D750 I bought when they were new and that fucker still works fantastic, taking gorgeous photos with the right lens.
Even bought a D3500 cause I missed the little guy. Same sensor as the D750 (expeed 4) just DX format and worse AF. Weighs like a third of the D750 too!
Nikon makes fantastic bodies and lenses.
I also have a Nikon D40 (2006) and it is still a perfectly great camera which I use fairly often. I only upgraded to the D7100 to have better physical controls. But I keep the D40 charged (charge lasts about 6 months) and with a small lens so it's ready whenever I want to grab a smaller lighter camera.
Once you are bought in, there's no point to upgrade because if anything it will be to spend thousands for marginal gains. Only worth it to pros who can spend thousands on gear a year as operating expenses for business where they bring in factors more with that equipment.
As you said, probably never. There's only so many pixels the eye can see and the human eye isn't getting upgraded.
I have a print on the wall here which is 4ft wide, taken from a cropped section of a photo from my 24MP D7100 and it looks fantastic. Unless someone is printing out murals, there's no need for more and more megapixels.
If you don't need the video features of newer cameras, the main advantage of newer DSLRs is improved low light performance.
You don't need the extra megapixels unless you have specific needs, such as perhaps astrophotography.
An "ancient" ~7.2MP sensor gives you 3000x2400 pixels. Plenty for full page prints at 300DPI.