Battery operated devices are all over the place, there are just more components that require a battery, even small sensors here and there may use one. The current trend is pushing for this kind of automation where more devices are practically necessary. Ebikes are a part of the deal. Besides they are the best micromobility vehicles so far.
Unironically my health seems to be better for completely unrelated things. It’s not the vaccine that did that, it just happened, but according to these novax I’d be a mutant by now. Also people stopped talking about it, the only people who still insist on the covid thing are these novax conspiracy nuts.