These cheap calculators certainly have history. I think it's even persistent.

Chips with megabytes of non-volatile storage can be had for under a dollar at scale these days.

https://us.rs-online.com/product/microchip-technology-inc-/s... ... 4MB (32Mb) $0.74.

The TI-84 EVO brags about having 3MB on their $160.00 device. Cool TI, don't strain yourself...