Yeah they decided it wasn't worth their time, probably because the market shrunk. They could have made money on the education market because their RPN is a wonderful thing but it would require to explain things to kids and teachers .. so now it's all built by another company.

I sniped a 48SX on a Craigslist equivalent for 20$, the guy even sold the full manual and 3 math/asm books, I couldn't resist.

I'm learning electronics, I plan to mod it if I can, maybe an ESP8266 "coprocessor", a rechargeable lithium bat. and a usb port.