IndigoUnicorn
E*POWAH Master
Would you like to open little more this requirement? What is the actual reason? The tube adds too much weight to a bike?
I've had impression that tubeless is initially more secure than with tube, but you can always put tube back in serious punctures.
Just the opposite, is my understanding. The bike is too heavy for the low pressures MTBs typically run in the tires. BUT, again, I know folks run tubeless in their eMTBs. Staying tubed is the decision I made after thoughly discussing the option with my LBS (that is a Trek dealer).