I'm a little surprised that brakes and such aren't electronic. I've seen wireles...

I'm a little surprised that brakes and such aren't electronic. I've seen wireless shifters on bicycles. And the gearing is something I would fully expect to be beyond most home mechanics. That is, I'm surprised the transmissions haven't gotten a bit more involved.

I suppose the market catered to itself, and things were kept more home serviceable for longer?