I'm not sure that's practical, but I think there are certain regulatory things one could do. Like requiring that especially ebike motors can be repaired, that

I'm not sure that's practical, but I think there are certain regulatory things one could do. Like requiring that especially ebike motors can be repaired, that parts are available and fairly priced, that any software needed to service bikes is made available to repair shops at decent prices etc. I don't think you really want heavily standardized components across brands since it limits innovation and forces lowest common denominator solutions. You want repairability. I choose cars, motorcycles, ebikes based on whether there is a decent repair shop nearby. Because stuff will wear out and break. You will have to get work done. And when that happens you want someone who makes an honest effort rather than some junior mechanic who will just follow the standard repair procedure no matter what. (Don't get me started on how poorly qualified brand-affiliated car workshops often are)