In your opinion, are the late model Zero motorcycles reliable?
Can't talk to the specific reliability of Zero, as I don't own one (in fact, I very recently came to the conclusion there will not be an e-motorcycle supporting my reqs for at least 5 more years, more likely 10+, and bought an ICE bike).
But there's a rather important piece of info you may be missing, if you're thinking "electric motorcycle as transportation appliance" or "reliable leisure machine". No e-motorcycle is there yet (e-scooters -- Vespa-type, not tiny-wheel-stand-on-it-devices -- excepted). Zero is the largest player worldwide, and they only make ~2000 bikes/year.
That severely limits the scope of their R&D, production/assembly line & customer service investments. There are regularly complaints here about why Zero's Customer Service appears to be neglected: Answer is, they can't afford to do much better at this point.
They also apparently can't fund development of a second family of larger bikes (larger frame, for making sport-tourers or tourers, or comfortable 2-up bikes, capable of handling large battery capacities like 25-30kWh), or development of a fairing, or, apparently, a decent L2 or L3 charging system.