Graham, you must be really old! :-)
I have an electric bike which will go faster than I want to go, needs to be charged every three days for my 15 mile round trip commute, and is quite reliable. I also have two electric cars for my wife and I. When it's time to tinker and experiment, that's when the moped comes out. What a great platform to play with. Reasonably inexpensive (unless you go nuts like I'm doing) and a large number of aftermarket options. They all have their place.