In a general sense, while still an energy hog, it is a lot easier to power AC on a bus or monorail because of the way energy is sourced to the system. Gas, natural gas, electric. A gondola cabin has no external power source and has to run all electrical on a battery. A battery is not going to be good for all-day AC in Florida. Technology is getting there on rechargeable batteries that can handle the power drain, but it's still not prime-time ready, let alone for this kind of application. Swapping batteries and having sufficient "extra" carriages to swap in and out during battery turnover is pretty unwieldy (space, labor, general expense).
So I wouldn't look at this as "well, then, it should be good for every form of transport!" Every form of transport has its own structures and power sourcing, and it varies.