Not everyone really...
Bought my first E2 box in a Tescos car park in Waterford, you'd swear it was like buying a bag of drugs...
Original Solo, had it up and running an hour later. Traded it in with the same dealer in the same car park a few months later for a Duo.
Never used an E1 box, so no idea how hard the transition is.
ViX has been simple to use since day one IMO, but guess it might be down to trying pressing different buttons & seeing what they do?