I do buy new games even full price on rare occasion. Regardless of that, there's nothing new games do much better than old games besides graphics and that mattering declined hard once league of legends, counter strike, fortnite, minecraft, roblox, etc became people's childhood to their ongoing adulthood games. I've met people that haven't spent a dime on genshin impact while having played for 5 years
No one is missing out on the best 2025 games if they're playing the best games of 2015. Time is finite and if it's filled with good, what difference does it make if it's new or old. You're not missing out if you're playing the best games of 2000-2014 in 2025.
I follow emulation on Android communities and people love playing the greatest hits of the PS2, Gamecube, DS, 3DS, PSP, Vita and it seems to mostly be teenagers. And now we're getting good PC emulation support and PS3 and X360 support is progressing. Switch on Android emulation is pretty good now. Android, Steam Machine, Steam Deck, Steam Frame, Legion Go, Rog Ally, GPD Win, Ayaneo. Even Switch 2. The relatively low power gaming scene is growing and that bodes well for "classic/retro/oldies" gaming.
It's been 12 years since the PS4 launched. Early PS4 games don't play much different than 2025 games. The classics oldie radio station of games are soon going to be very modern. 2007 Bioshock era games are already very modern and look pretty good too