Based on my experience, people wanting to play games which are over 20 years old are much more of a niche crowd than those using beefy GPUs. Obviously, few people have RTX 3080/3090 levels of investment, but based on Steam statistics, mid-tier cards from a few years back like the GTX 1060, RTX 2060/2070, and RX 580 are all near the top of the most recent steam surveys.