Exactly. No one knows what the future will bring. It may favour a present-day architecture, or it may not. There's no planned obsolescence, just as much as there is no fine wine, either. Marketing and tinfoil hats.
AMD or Nvidia will optimize drivers for the
new architectures first and will not care to be everything fine for older Pascals cards for example.
Edit: they optimized newer 9000 series for lower pwr draws in idle and video playback but not for the 7000 series. Why? They want you to upgrade...
With the new drivers Pascals consume
less power but, will be for example
more shimmering on textures(fences, radiators of cars etc) , for example War Thunder(Dagor engine in cooperation with Nvidia), AC Syndicate(just to name few),
if you want to get rid of the shimmering you have to force your old Pascal in heavy and demanding settings like SSAO 4+ hidden settings in config files like clipmap scale and others.
These heavy settings will push high loads of processing and power to your old GPU.
At this point you have 3 options:
1. Deal with shimmering and mess up your eye sight
2. Deal with higher power consumption and heat, modifying the stock cooler at your own cost and maybe risk, to mitigate the heat and degradation.
3. Upgrade
Edit: 1080 TI with SSAO 4 and clipmap scale + background scale from 1 to 2 can Increase temps from 49 to 65C depending on the map, this will eliminate almost entirely the shimmering with +15-16C cost
1070 in AC Syndicate in order to eliminate shimmering on textures and shadows you can play with HBAO settings but will in crease from 53 C to 68 C = +15 C cost
My question to you is what about same cards being stock coolers and TIC in a silly Prebuilt case, what temps we gonna talk about? we gonna sizzle some VRAM!? We gone have GPU throttle??
The point is, In the end of the day you'll want to upgrade. So call it something else if you wish, not
planned obsolescence but, the result is the same, you will upgrade.
At hardware level,
planned obsolescence is there. I've seen it to often.
Corsair 650 TX from 10-12 years ago is much alive and well despite heavy smoker user, sticky tar and nicotine on fan and components.12+ 5+ 3.3 all perfect, not even small oscillations.
Corsair 550 TX(7 years warranty) from 7 years ago , non smoker user, the PSU has drops on 12V+ of minus 3.5%, still in tolerance but, maybe just for another year.
He already set his 1070 to 85 % pwr because even is in tolerance, games starts crash out in Windows or he has black screens.
The user with 650W TX has like for example, 25000 hrs(aprox) use while the guy with 550 TX has a 3000 hrs(aprox) used. One user using his pc daily Corsair 650 W TX, while the other with 550TX he use it in Weekend only about 4-8hrs total.