HP Prime - worthy successor to HP-71B ?

[KeithB]

Since I have both, I guess I have to put my oar in.

As was already said, the main advantage for the HP71 is I/O: the HPIL/GPIB/GPIO interface can let you control just about anything on the planet - and with an RPi ethernet bridge, you can control the rest. 8^)

Unlike some here, I really like the calculator mode. Because Sandia had limitations on calculators allowed in Secure areas, the HP71 just squeaked under the ban. (Sandia would have bought me a prime, but I would have had to leave it when I left)

The Prime is the first calculator I bought for myself since the '71, and I am amazed at its power. I don't do calculus often, but the Prime has handled everything I through at it. Calculations are much better in Algebraic textbook entry mode, with no ambiguity due to precedence. (I do have trouble telling the difference between subtraction and unary minus, though.

So, I like both, and they both have a place on my desk.