While I am not interested in the Steam Deck, my computer is an older one that I rebuilt in 2015. I cannot run Windows 11 on it and I am not in a position to have to buy a new machine or new parts to rebuild one at this time just for the new Windows version. So, Windows 10 is as far as I can go at this time and that's fine while Windows 10 is still supported. I have dabbled in the linux world for years, often dual-booting my desktop. I found a non-systemd distribution that I like. Steam proton works very well running LotRO on PCLinuxOS. Only issue that I have is that launching the game glitches at times and I have to kill the launcher and restart a few times to get it going. Just like tapping that old vacuum tube TV ;p. The bullroarer client runs adequately, as is, in a generic WINE bottle. Any tips on getting better performance from generic WINE, I'd be interested in getting. Interestingly, I could not get Crossover to work on PCLinuxOS, 2021 version. As stated, Steam Proton did work.
"No sadder words of tongue or pen are the words: 'Might have been'." -- John Greenleaf Whittier
"Do or do not. There is no try." -- Yoda
On planet Earth, there is a try.
Indeed, in a world and life full of change, the only constant is human nature (A is A, after all :P).
We old vets need to keep in mind those who come after us.