Michigan basically all the fast food stores have been shut inside since the restaurants were closed down originally. I don't think it's currently still a mandate, but we had a lot of capacity restrictions, and I think most of them just decided it was easier (and cheaper) to not open up inside. I'm not convinced it's a labor shortage issue so much as a cheapness factor (especially when you consider all the extra cleaning they'd need to do with people in the store).

Note, a number of the fast food stores (including mcdonalds) have curb-side, so if the drive through is real long, sometimes you can do that instead and beat the drive through line. Some are better than others (from a store to store, not even chain to chain) at how well they really handle it. Wendy's is particularly bad, and lately most of the ones I've been by have pretty much simply stopped offering curbside and only do drive through. As as result, Wendy's doesn't get any business from me.

Like I said, I don't really believe it's a labor issue, just plain being cheap. (Although I've finally been seeing some signs that they might start opening back up around here).