It’s easier to use than some boards, doesn’t mean it’s easier to use than all new boards?
Many people who post on YB are dyed in the wool posters who’ve been on here for years. A lot of them/us won’t have used many other types of forums (I’m not saying that as an insult or patronising - it applies to me, I don’t post on any other forums), so this will be seen as the ‘best/better’ option purely because we don’t know what else is out there. In that sense, I can see why trial periods of other forums are the best way to go.
That would need some patience though - maybe a set trial period of different types of forums, if they’re clearly crap and the majority decide that this is better, then other types of forums can be gradually ruled out until this place is remaining as the best option.