> It's more powerful than your PC back in the late 1990s.

Sounds like a fun thought, but almost certainly untrue: https://www.swissmicros.com/product/dm42

All new PCs sold in the late 1990s handedly beat these specifications. On CPU, storage, RAM, and display. The DM42 firmly remains an embedded system that's just enough for the calculator software and not much more.

If you want to take it back to the early 1980s, you start reaching the claim being true.