Why not a color hp 50g?

[Siegfried]

As discussed elsewhere, non-educational use of calculators does not seem to warrant new developments at the time. While not as good at any special task, the ubiquity of mobile phones and tablets seems to have shrunk the market for affordable specialised devices to a point where development is no longer viable. Calculators are better at calculating than tablets with calculator apps but to 99% of users the latter seem to be good enough to forego carrying a calculator plus a smartphone.

While this might be sad for tech-oriented people, mediocrity in a broad field wins over specialisation on the long run (exhibit A: homo sapiens).