Audacity has a lot of low hanging fruits in the UX department. E.g. every single one of these "You have not selected anything to apply [feature X] to. Try pressing Ctrl+A to select everything and try again!" dialogs should just not exist (if nothing is selected, apply to all, done), or when exporting to a format which doesn't do separate tracks and there are multiple tracks in the same channel, Audacity just silently merges them (throwing away data). When recording while a track exists there's some way (outside of punch-and-roll, I think) to have it record into the same track again with no warning, throwing away data. Scrolling is vertical for some reason, even though horizontal scroll is the primary scrolling timelines.