I think some of the hotbar and switching stuff you mentioned is in the game now. Or it might just be experimental, which is what I play, though that has other bugs and issues.
I really only got Satisfactory to play with a friend, but I usually avoid buying early access games because of stuff like this, where I feel unsure of how harsh I can actually be on a game that isn’t finished yet. But that’s a whole other topic not specific to this game.
It was definitely validating to hear that I’m not just being dense in feeling like 3D is a huge distraction.
For the record, I finally fixed the “problem” in my rail by removing a single segment of track and then putting it back, and everything started running. Cool. Glad I spent 2 or 3 hours scratching my head over that one assuming I just did something wrong.