It also doesn't help that the podcast team keeps going on about that all the time too. People don't seem to understand that AC has to be powered and it isn't something that can be powered by slapping on a couple of solar panels on the roof. Also, the Ony gondola that has AC is the one in London and it reportedly doesn't work all the time.
Actually there are at least three systems that have it. Wynn Macau Palace system has it and I don't remember the other at the moment. Doesn't change the fact that AC is very rare in these systems.