It's okay if you're always going to use it with an electric hookup. But you're right - without propane and without electricity, you're not going to have hot water or heat/AC. You could use a generator, but that's a lot of extra headache. And some campgrounds do not permit generators, or limit their hours - i.e., you wouldn't be able to run it at night, for example. And don't forget the headache of carrying the generator, refueling it, worrying about it being stolen, etc.
Personally, I'd never buy a camper that was converted to all electric. The price would have to be low low low for me to even consider it, because my next move would be to reinstall propane. I don't really understand why people do this all-electric conversion - propane is actually incredibly safe, probably safer than electricity, and each tank has a LOT of stored energy that can be used to heat things easily - including running our camper's fridge. (We also use our camper as a 'lifeboat' at home when the power goes out, so an all-electric camper would mean it's no better than our house.)
1995 Airstream Classic 30' Excella 1000
2006 F-250 6.0L Powerstroke Supercab
Sold but not forgotten: 1991 Airstream B190