Why would your ebike only last 2 years? I would say even if someone doesn't take care at all for their bike it should last 4 years minimum (and much longer on average).
Right? My $2k e-bike has lasted far longer than that with a $5 bottle of oil and a few $20 inner-tubes. I spend more for 1 tank of gas than I have on that e-bike for maintenance in 4 years.