Went to 2 low-scoring Padres games this week, and the pitch clock impact on food+bev / ballpark experience cannot be understated. Fortunately Petco has a million point-of-sale options and the beer lines were almost non-existent, but even with an extra half-inning, it is a struggle to drink more than 2 beers (3 at most) in a 2:15 game. You can easily miss an entire inning getting food or hitting the head, which is like missing 10-15% of the game for every trip out of your seat.
Postgame, it's really not a huge deal if the park is located in an urban area with tons of bars and restaurants immediately outside the park. Spilling out into the glorious sunshine at 3:30 in the afternoon is amazing, plus 2 hours of beers still has me in an ascendant mood, not the LOATHSOME CREATURE that 4 hours of drinking in the sun will produce. The game just becomes a part of an afternoon/evening out, which is when baseball is at its best (as opposed to football, which is seemingly an all-day commitment).
Pace/gametime will definitely impact the experience at parks like Milwaukee, Oakland, and Philly, and others (KC comes to mind, but I've never been) where there aren't a lot of postgame options immediately outside the park, and you're spending 30 minutes and $30 parking, then another 30 minutes leaving. Kind of impacts the decision to attend a game in person, I'd imagine. I think that attendance might actually be down this year as a result, particularly at the aforementioned isolated stadiums. Could be an interesting unintended consequence of the pitch clock, and one that might impact how and where future parks are built.
I recommend this book if this stuff is interesting to you: