What kind of fun though? N+1 does need some justification. I always thought I needed a faster XC bike but faster and fun sounds great.
My rigid Swift feels much smoother over roots etc than the 26″ rigid sanderson it replaced, with more grip too. So from that I’d extrapolate that 29er ‘feels’ like it’s got about 2-3″ more suspension than it does over rough stuff. So a 29er with 100mm travel would feel like it had much more than it’s 26″ stablemate.
But it doesn’t have the suspension which means 2 things:
1) Drops still hurt like they do on a short travel bike
2) It’s faster pedaling as you’re only bobbing that short travel.
Takes time to get used to though. At first I though it was just different, felt slower, unresponsive etc. Now I ride a 26″ and it feels choppy and unnececeraly hard work, and slow, like you’re having a really bad day on the bike whereas the 29er just flows from one thing to the next.