> Truth be told, nobody makes hardware the way they used to in the 70s and the 80s.

> Simply put, CASIO is the king, and fx-991EX, whatever you call it, is the mother of all calculators, both in build quality and features

Let me introduce to you the DM-42, the ultimate calculator

https://www.swissmicros.com/dm42.php

Precision? 34 decimal digits

Build quality? Steel case for starters

Keypad? Harks back to those classic HPs in feel

Screen? High-res, high contrast

Performance? 24 MHz ARM core

And best of all? Fully free firmware that you can verify and modify to your hearts content.