In terms of performance, they're 90-95% as good as the gas models they replaced. But they bring so many other benefits to the table that I'm simply not ever going to go back -- mostly the lack of exhaust fumes, the much lower (and less messy) maintenance, and much much quieter.
There's still some use-cases where the gas variants are better, just like in vehicles, but they are few and far between and it's often worth it to just figure out how to get around using the gas models.
I really don't think there's a turning back at this point. It's really now a matter of filling out all the market ecosystems with electric vehicles.