Maybe take it up with his boss? I really can’t see the restaurant caring one way or another, as long as the shift is covered by someone qualified to do the job.
I moved to Reddit when Digg destroyed itself. It wasn’t too hard to make the switch, although it did take a bit of getting used to. I imagine it’ll be the same this time, or maybe a bit easier, as the format of lemmy.ml is not too different in appearance from Reddit.