In my experience, having owned a Trek Stache 9 29+, and a Jones Spaceframe bike.
1. Weight , yes the Jones did weigh a bit more than I expected, the Stache 9 wasn’t too much of a shock once it was converted to tubeless tyres.
2. Weight in the wrong place…. Most of my riding is at Afan with long climbs. This is ultimately what made me sell both bikes.
Well documented about bit wheels climbing slowly, I just couldn’t get on with the loss of inertia when technical slow climbing.
Rolled really well everywhere else, but the extra effort uphill for 40 minutes or so (at a time) was ultimately the final nail in the coffin.
3. We don’t get much snow now.
4. Undamped bouncy(ness), more apparent on the Jones, but also some undamped bounced on the Trek.
5. Rolling resistance was more noticeable whilst climbing, once up to speed it actually helped.
It’s only my opinion , and a lot depends on what you want from a ride and where you ride will ultimately decide . It’s difficult , but owning and trying different bikes is the best , and only way to form an opinion is to ride a few bikes.
I’m glad I tried them, but not for me.