Absolutely. It's honestly the older titles that tend to work better as well, perfect for an older setup. A nice static target for the conversion layer. Proton was pretty good 3 years ago, now it's amazing.

Lots of Devs I've noticed tend to be happy to tweak things on their end to get something to work better with Proton as well, or if we're lucky they just use Vulkan out of the gate and make it a very straightforward job.

A good benchmark is seeing how steam deck users get along with that game. If they don't hit any snags it's a very good chance you won't either

Interesting. Got Horizon Zero Dawn to work out of the box myself but I'm using Garuda. Any chance you're using an nVidia GPU? They tend to be a lot more fussy with Linux than AMD

I switched back in 2019. It was pretty good then and it's almost seamless now. Hell EAC works now and I can play Squad without any hiccups

I will say this - nowadays I have to figure out maybe 5% of games I play on Linux, and often times those games have issues with certain windows setups too

Heck several games the do use EAC work now. Valve flexed some muscle and got compatibility with Proton pushed through.