Pennsylvania’s laws have been discussed before; I grew up there, but haven’t lived there in 40 years and never purchased alcohol while living there, so I don’t have much to add re PA laws.
I moved from there to North Carolina, thence to Virginia, which have similar laws: beer / wine sold at any grocery or convenience store, liquor only at state-run stores. NC didn’t have liquor-by-the-drink when we first moved there; there was a huge push by the restaurant industry to fix that. It passed, and despite the naysayers, the state did not go to hell as a result.
I remember being shocked when, in the late 1980s, I first saw liquor sold in regular stores (this was in Indiana, I think - though I gather DC and Maryland both do so as well).
And in NYC, alcohol of any sort was not sold in grocery stores, at least in the early 1990s. You had to go to a separate liquor store for wine, beer or liquor. I think they were privately owned; I only bought wine once or twice while there.
The most amusing was New Hampshire. For several summers in a row, my daughter attended an arts program in southern Maine, and we drove her to / from there. Usually we stayed in a Boston suburb - as it was an easier day trip from home to Boston, then a day trip to/from Portland to the suburb. And we passed huge signs advertising the liquor store just off the exit in New Hampshire.
We finally stopped at one, on the last trip, and were pretty impressed by the selection. Since we drink so little, we didn’t buy much, though I admit I was tempted by one “airplane” bottle that was shaped like a skull (it was poorly labelled but I later found out it was a brand of vodka).
My impression was that the place was so heavily signed because NH has no sales tax, and they were trying to tempt Boston-area residents to go up there to get their hooch. Friends who live in Boston tell me that it generally wasn’t worth the drive.