E-bike share bikes have been in the Bay Area for a long time. You rarely see them on recreational pathways, though, as people who rent them are typically using them for transportation rather than entertainment, and they ride the shortest fastest routes which are usually streets with cycling lanes or designated bike boulevards. There are LOTS of e-bikes (personally owned) being ridden on our Greenways and bike paths; many folks have dumped the 2d car and use electric cargo or bakfiets to take their kids to school or shop. Lots of seniors and others have bought e-bikes as a way to get exercise during Covid lockdowns. But it's rare for anyone to be riding a class 3 on these paths, usually it's bikes with 20mph limits and it's not an issue. As long as people continue to mostly ride in a safe and sensible manner I don't see that as likely to change.