I've always found the mac software space to automatically weed out bad UI. The userbase is used to certain behaviours (as generally described in the UI guideli

I've always found the mac software space to automatically weed out bad UI. The userbase is used to certain behaviours (as generally described in the UI guidelines from apple)- and apps that don't follow that tend to not gain much traction. Sure, the app store will expose a bunch of crappy apps from people who don't read the guide - but the market should weed them out in a hurry - those who develop according to what the market expects will succeed over those who write junk.