another vote for tubeless - sooo pleased not to see any more snake-bite punctures. But, I agree, it's not perfect...
sure, compared to a tube it's more of a faff to setup the wheel with tape and getting a good valve-seal, but once it's holding air it's usually pretty good. But, I've had MASSIVE issues with some tyres being so well held into the rim that I've been unable to break the bead without using a flat blade and twisting between the rim and tyre, which can catch the rim-tape and cause a sealing problem when re-sealing it all. I guess the sealant makes this even worse as it marginally adheres the tyres to the rim-walls...
The only problem on a trail I've had is somehow ripping off a knob/block from a tyre which left a gaping hole for the sealant to flood out - not too much of an issue, as I can just slap a tube in and fix in 5 mins. BUT, in the rain, with wet hands and tyres, could I break the tyre's bead and remove one side of it to add a tube, could i ****. It took over 45mins and 4 of us taking turns to try and prise the tyre away from the rim and fit a tube, crazy...
I tried a few WTB tyres on my old WTB STi23 rims and they were a little bit of a pain, but Maxis Hight Roller 2 seem to be a nightmare to remove from my current E13 TRS+ rims. To replace the torn Hight Roller 2 (and for better winter grip) I swapped to 2.5 wide Mavic Claw tyres, and hopefully they're not as bad to remove.