If eBikes cost $200 I wouldn't mind the lifespan.
Rode my 35-year-old Raleigh the past two nights .... it actually weighs 26 pounds, and as with the sewing machine, the new plastic alternatives weigh ten pounds less. But even though it didn't come with a manual, it is pretty easy to operate.
Really, I only want stuff to last until I am done using it ... but that might be for as long as I live.