I like setting up my SteamDeck docked on my big TV. Newer games look rough at 720p, but playing older/indies at 1920x1080 + 4 controllers is a great experience.
Let's say I want the option to boot into a frontend that makes it easy browsing a local collection of shows/movies on a USB. What are my options? So far Kodi seems to do exactly that, but I've heard of Jellyfin/etc.
I've been using the absolute simplest option - just use normal desktop mode and then KDE Connect for control. KDE Connect connects your phone to anything, and then can use phone touchscreen as mouse for the deck.