They had the old flip phone mobile version of the site up and running up until they made the much hated API changes and silently killed it. It was pretty crap and I'm sure almost no one used it but it does seem to be completely dead now and redirects to the main site.

Archive link as recent as 03/23:
https://web.archive.org/web/20230324011118/https://i.reddit.com/

I know I use old.reddit.com when I'm on my desktop. I think many old time users do. I'm sure reddit is aware that they'll lose a bunch of old time posters if they kill the site. As people get older though, the number of users using old.reddit.com is bound to be decreasing as there's no active links there. Once it hits a certain threshold, I'm sure they'll nuke it. Or, they could spin another controversy to distract people.. that or they'll bring back r/place for the nth time.

The last cool sites I've found are like your Prius one and also many many years ago now. www.a-body.net and www.grandmarq.net have been my go to's for years now. It probably also helps that I seem to buy the same cars over and over and over again. Actually, that's not 100% true. There's also Mike Hawk's QB page (https://qbmikehawk.neocities.org/) that I found a few years ago via Pete's QB site's message board. Really amazing QB programmer.
The few random times I'm on something without ad blocker and on the web, it's horrifying how bad it was. It's somehow better and worse than it was back in the 90s. Better in that things don't seem to randomly install stuff on your computer without you knowing but worse in that instead of pop ups, they're complete page blockers of the page you're trying to visit... Though that said, usually pages like that aren't worth the time it takes to read them anyway.