SteamOS is immutable, you always get the same update no matter what you were running before. I think the only files that can get out of sync are in your home folder.
Ahh right thanks for confirming. When I last moved to beta, none of the buttons would work and I could only use the touchscreen. I thought that was quite odd considering beta seemed to work fine for others. Any idea what could’ve caused that?
Mine does this after closing a game until I open the steam menu, then the buttons work again??? So weird.