Eh, a motorbike isn't going to be as comfy as a car with an AC regardless of whether it's electric or gas powered. Vented gear and lighter colors can help a lot in the summer, but they don't look as cool and people would rather scorch in black gear and be almost invisible at night apparently.
I've seen a much greater adoption of EVs in my area once the range started becoming decent enough, along with the prices and the greater availability of charging stations. And I figure the same will happen with motorbikes. Electric scooters are already super popular in the city. They're cheap, they allow you to skip traffic, and the range is decent enough for short commutes. Once there's bigger motorbikes with a decent enough range and decent prices, people will buy them as well.
There's something that bothers me about the whole EV transition thing which is how polluting the transition itself is - if I have a newish gas powered car, that took a lot of resources to build, am I really saving the environment by buying a new EV, which will cost even more resources? Ideally, it would be people with really old very polluting cars switching to EVs - but because of the cost of EVs, I notice it's mostly people with bigger purchasing power switching to EVs - people who often already had fairly new and efficient gas vehicles which could keep running for a little longer without as much harm to the environment. I have a not that old medium CC four-stroke motorbike, with a low fuel consumption and supposedly fairly low pollutant output. Even if a decent alternative EV exists and I switch to it, how long do I have to ride the EV before the polution benefits of the EV in comparison to my current bike outweigh the pollution cost of building it in the first place?