You can still install decky loader it on desktop
Yes! You have decky loader with a plug in called Steam Grid DB which updates the art for these games really easy
I had to install a Virtual machine for playnite but now I’m gaming complete on Linux! Also remember you can have xbox gamepass on the browser
Since steam deck came out, I switch to Linux desktop for gaming and it is going really good. Can play my whole library
You can still install decky loader it on desktop