Hi guys, I'm new here.
I tried a ~9 mile commute from the local transit station to my workplace. It's not as tiring as I thought. I used a MTB for a week and half before it was stolen. I am now thinking of getting a Montague folder that I can take on the train ( the train forbids transport of bikes in rush hour even though the train I take is like 50% empty

).
But reading this thread, I see there is a lot of advice against MTB for commuting? Is it the added resistance of the wider tires?