I had a very similar situation.
Meanwhile my Steam Deck I turned on, did a quick update, and was playing Halo within the hour.
I really enjoy both, but welcome the extra grunt and windows os of the rog ally. So I can play everything easily across multiple launchers
I do updates on my rog ally more frequently than I originally did on my deck before I sold it but I'm used to updates so it doesn't bother me. Nothing where I had to redo windows pins or login or multiple restarts. It's just an update to armoury ctate every now and again plus the myasus check.
I'm surprised that there's so much praise for steamdeck, I guess it's totally fixed now then because I had my fair share of os oddities.
Not waking up from sleep correctly and needing a hard reset.
Controls stopping working when waking from reset.
Waking up and being un responsive.
Randomly stuttering with audio and loss of performance requiring a hard reset to fix.
Randomly just becoming unresponsive and needing a hard reboot. Where the os looked like it was working but it just stopped launching etc.
I imagine that's all ironed out now as even the rog ally has come along leagues from launch.
Some teething issues but I genuinely think these devices are amazing and are only going to go from strength to strength