I think it's a sliding scale. The more unique your product is, and the more pain it solves, the more users are willing to put up with hard UI. I've seen a lot

I think it's a sliding scale. The more unique your product is, and the more pain it solves, the more users are willing to put up with hard UI. I've seen a lot of bad ui make a lot of money, because it found a market segment that had no other options.