If you have an 8GB GPU that’s a few years old, it’s probably doing okay-ish. It probably doesn’t have the performance to really suffer from VRAM limits and you don’t game with things like raytracing or ultra detail settings turned on because the GPU isn’t fast enough for those things anyway.
My Vega 64 had 8GB VRAM and that was fine.
If you buy one of the new GPUs with 8GB though, the VRAM is a huge problem. You have the GPU power to have all the features turned on, but you’re going to see real performance crippled because it overflows VRAM.
Longevity is the other issue - when games released in 2025 run like ass on your 8GB GPU from 2017, you won’t be surprised. Bad performance from an 8GB GPU that released in 2025 for $500, that’s a problem.
Mine got upgraded to a full meg.