No Linux Proton Support
I would play Lost Ark, but the developers (or Amazon) have specifically excluded Linux users at this point in time even though it's 'apparently' as simple as flipping a couple of switches for EAC support and dropping a single file into the distribution.
There are varying arguments of whether it is actually that simple, and there are two different versions of EAC, both of which 'should' enable Lost Ark to work on Proton.
If they ever bother to implement these, seemingly simple, changes I'll give it a bash; else life goes on. I'm certainly never installing Windows again just for a game.