Where I ski (WA state) the law is that ski areas have to operate at 30% reduced capacity. But, like
@MissySki said, lift chairs aren't going up full and since people aren't carpooling, so there are long lift lines and full parking lots. There's also a lot of congestion around the base area because people aren't allowed to hang out inside the lodge. So it appears a lot more crowded than it really is, though there is undeniably a hassle factor with the lines, parking and congestion (again, where I ski at least). My slopes aren't more crowded, but since the mountain does sell out every day, there are more people on the runs than you'd otherwise get on slow days, but less on what would have been very busy days (though people ignoring the reservation policy and coming without one is still a problem).
It's a tough year. I've gotten frustrated with how things are working, but I'm also sympathetic to the ski areas that have to figure this stuff out and deal with it.