Waiting to get my first Ebike. I've watched several youtube MTB vids on the subjects of chains and cassettes. I'm old. I'm never going to be doing any wild trail riding. I manage a large ranch and will be riding mostly on dirt (rocky, gravely) roads with moderate hill climbing. I suspect I might use the throttle more than a younger person. I am anything BUT a speed freak. I can't think this sort of riding will be all that stressful on a drive train. But my bike will also have a Bafang Ultra motor and MTB gearing. I've had mountain bike style bikes for half my life and understand shifting technique. I'm wondering if anyone here with experience might ride like me and might give me advice on what sort of life I can expect on my drive train before getting a new chain and cassette.