To build on that - despite bike companies trying their hardest to over complicate things - e-bikes are fairly straightforward to build, maintain and modify.
Tons of great (and safe but not cheap) DIY kits out there too which help make old bikes new again.
My e-bike is an old 90s MTB with a 220km range ( at the lowest assist level and 32km/hr top speed). That doesn’t include the benefits I get from regen braking when riding it in urban / suburban areas.
The Littlest Hobo.
80s kids in Canada.
Link: https://youtu.be/0kabcD3r1Bs
Also: Today’s Special and The Polka Dot Door.