The PS3 is a must have in my opinion. And will only becoming more so over the years. Many of its games have been lost to time or relegated to streaming. I am very glad I bought one last summer for only like 60 bucks. I have a PSN account since 2007 so this means I had access to games such as Afterburner, Outrun 2, GTI club+, Tekken 5 DR, House of the Dead 4 etc. And I still had a copy of Ridge Racer 7. There is no other way, besides emulation, to play these games afaik.
I went on a buying spree soon after, and bought Resistance 2 and 3, DIRT 1, Virtua Tennis 3, Ridge Racer Unbounded, Infamous 2, Black Ops 2, NBA Street Homecourt, Sega Rally Revo and Motorstorm 2.
I must say many of those games hold up remarkably well. And many of those type of games don't get made anymore. Try to find something like Virtua Tennis 3 on PS5 for example. Its absolutely fucking glorious. I played its World tour mode a fuckton. The stupid minigames, and improving your stats.. I love it. Same goes for Homecourt, which I beat. It looks amazing (its a native 1080p game, but framerate is unlocked in this mode), and its fun doing tricks and breaking your opponents. I have nothing like this on PS5 as well. RR7 is self explanatory, Namco left this franchise for dead and RR7 is a looker still. Banger OST on top.
And Sega Rally Revo, absolutely great. Its an arcade circuit racer that has nothing to do with Rally but its graphics and mud effects are quite insane still. I like the simplicity of this game. Its just about choosing a car and rinse some tracks. No voice overs, no dozens of setups. Just race.
On top of that there is a wealth of gems on the JP store, PSone classics you can buy for like 600 yen. Einhander anyone?
I do hate some things about it, mainly its slow download speeds, its slow unpacking process etc. But once everything is installed its fine. Its a great console with a ton of diverse games.