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

[Dave Britten]

The Prime is a vast departure from old designs, and lacks a lot of the customization features that we're accustomed to, particularly custom soft-key menus from the 48. Also its RPN mode is fairly crappy. I'm kind of surprised nobody has written a Nut emulator/15C simulator for it.

The 35S has more bugs than a roach motel. It's so close to being great, and the hardware design is lovely, but the software is such a mess.