BrianSim: if MS-DOS games listed on GOG start "needing" an 11th Gen CPU + W11, it's certainly going to put a dent in GOG's sales from getting a little too carried away with mimicking Microsoft's fake requirements...
Quite honestly that stuff needs reviewing anyway. Looking through some games recently, it's obvious new games have "W10" written on them regardless of what they actually run on "because we don't support older OS's", whilst many older games that came here years ago still have "W7, XP", etc, listed as if GOG still does support them. "Minimum OS" here has become so inconsistent as to be meaningless for any reliable guide of what a game actually requires.
Elmofongo: What games use CPUs below 8th gen?
Pretty much all of them. I haven't seen a single game that will only run on an i5-9400/10400/11400 but not an i5-8400/7400 (or a Ryzen 2600/3600/5600X but not a 1600). It's nothing like the situation years ago when MMX, SSE, 3DNOW, etc, instructions were added at a rapid pace and compiled to as a requirement (or 64-bit only games won't work on 32-bit CPU's). The only recent thing I've ever seen like that is Celeron / Pentium not running literally only one or two Ubisoft games (that they wouldn't play well anyway) due to lack of AVX instructions with no SSE fallback code. The rest are usually fake made up "requirements", especially for lighter weight / older games here.