What I see in the Sac region are motor-driven cycles operated (mostly adults) as ebikes, where they're clearly not allowed. They can be huge. Have yet to see any rules enforcement on our bike paths. Riders for the most don't show good bike handling and control skills, making them a de facto hazard. Dress goes from one extreme to the other: zero protective gear/full moto gear with fullface helmets. Boomboxes are popular.

Then there are whatever those one-wheel gizmos are. Ridden nearly universally by young dudes, again with full moto kits. I've paced some approaching 30.

E bikes under the legal definition have so many types and riders I don't find a predominant rider type, other than the Class 2 throttle bikes seem to attract the least-skilled riders. Lots have clearly been jail-broken past the 20 mph ceiling.

https://www.dmv.ca.gov/portal/handbo...cle-operation/