I've done several thousand miles on my ebikes and the positives far outweigh the negatives.
But there are some.
Ebikes are heavy, bowling along on one cannot quite match the pure cycling pleasure from riding a lightweight bicycle in favourable conditions.
Ebikes are also harder to manhandle at obstacles such as restricting gates on cycle paths.
A few steps are difficult to negotiate.
To give a small example, the Brighton ride I did recently with
@ianrauk and chums finished with a flight of steps down to the beach to the chip shop.
Everyone else was able to walk/carry their bikes down the steps, but I was stranded at the top.
Fair play to the company,
@StuAff offered me assistance to lift the bike, and
@User pointed me in the direction of a ramp a little further along the seafront.
So not an insurmountable problem, but it does illustrate ebikes have their downsides.