Anyone running one with a 27.5+ rear to give the added comfort and flick ability

I don’t have a scout but I have just put a 2.8x650b rear tyre/wheel on my 29er hardtail. Clearance was similar to the previous 2.6×29 tyre and it’s only dropped the back by about 1 cm. I’ve not ridden it in anger yet so can’t comment on any added comfort but I’m pretty sure it’s quite a bit heavier