Why are the HP Prime and HP-35s so unpopular?

[Roberto Volpi]

I have read all the comments, and I think that, in order to judge a calculator, it is very important to take into account what that calculator is for.

I have recently bought a HP35S, and imho is a great calculator as far as it is used for what it is.

Of course someone who was engineer in the '90s, very passionate for his HP42S, will find it insufficient for his scope, but those machines have very different scopes.