What makes the Prime so fast?

[David]

I'm glad to be able to contribute some genuine hobbyist feedback that went through and to know that HP listens.
BTW, just like to mention the 3D graphing program and touch gestures are also amazing and am thankful for the work that went into it. I'm no computer scientist, so I can't really figure out the big picture about why RPL would be slow but efficient on the older calculators and what makes the Prime so fast; that's probably days worth of lecturing. But HPPL on the Prime seems to be much more powerful than User/SysRPL if they're able to make the 3D graphing program. But that achievement is likely due to modern Prime hardware. The HP49/50 also did have a 3D plotter with rotation. I have yet to try out every feature on the Prime.