48/50 vs Prime, what am I missing?

[acoto]

HP48S/SX is still my favorite HP calculator.

Never liked much the newer "Windows" style of HP48G/GX, even with a faster processor it felt slow, and bloated.

Many moons ago, while taking advanced math courses for EE, I was way faster with my memory limited HP48S, the awesome Math 2.1 symbolic matrix library by César Crusius, and a Laplace/Inverse Lib, than most of my friends with their powerful GXs, and similar (but probably more advanced) symbolic Libs.

I have an HP50G now, but never felt at home in that newer calcs. NewRPL is making a lot of sense to me.