I absolutely love my HP48SX and HP48GX (I have both) and the RPN is what I like the most. But if you don't like RPN, just type a regular expression between simple quotes and evaluate it.
Many built-in functions are open source too. Use the "PrintDefinitions" ResourceFunction to see the code of functions that are implemented in Wolfram Language itself.
Bring back the indestructible Apple ][e and put let the kids program in logo (turtle graphics) for 1 or 2 hours per week max. The will not hurt them while society takes a few years to figure out how the introduction of technology in education went so catastrophically bad.
I used to be one of those setting everything to dark mode, custom CSS and all, but I am now cured. It was a difficult time as my eyesight was rapidly deteriorating to the point that I thought that I would need to change carers to something not involving computers. I am so thankful that it is over. The source of the problem was that I had been consistently over-prescribed by different optometrists. I don't blame them, but something must be off in how they were trained. To avoid this issue, do not use regular progressive lenses in your eyeglasses. Instead ask for an "intermediate distance" formula optimized for the typical distance between your eye and the computer monitor. In practice this is a depowered formula supposed to be used only for computer used, but I used it all the time. On my next checkup my official formula had decreases confirming that it was too strong in the first place. I know don't have to use dark mode, and my vision is much better in general (I'm in my 50s). And don't over use your phones!!
New ones break quickly and then consume zero energy. So then you buy an even newer one without caring at all about the emissions to buy the new one and to get rid of the old one. And then feel good to be "saving the planet" because you have a super efficient fridge and repeat the cycle.