Same experience here. Just got back from a six-day driving trip where my wife and I used McDonalds restrooms without issue multiple times. Some of them were even quite nice, as such things go. But I've also found myself in dire straits in cities, with nothing truly public and the McDonalds/Starbucks all locked down. The most dangerous place I've been in the last several years was an MBTA restroom (I was desperate). So much for "walkable cities" I guess, but good luck finding a proponent who will engage with that aspect.