> PS3 used the (free) servers only for matchmaking and all online games were hosted on the consoles themselves. The matchmaking servers are still up and working

That's not true. Naughty dog shutdown online servers for their ps3 games in 2019:

https://www.naughtydog.com/blog/uncharted_the_last_of_us_mul...

Rockstar games shut down gta online for ps3 in 2021:

https://www.rockstargames.com/newswire/article/51989315o2aa3...

To be fair, there are private servers for these games, thanks to reverse-engineering efforts, but those are community efforts.