I am aware of that. The “get off my lawn” is a reference to the fact that those of us who are older would not have had access to such modern conveniences as flash memory in high school, and that the poster is too young to be aware of TI calculators that didn’t have this feature.

Anyway I used an HP48GX throughout high school (carrying a TI83 only if absolutely necessary). The HP had a pretty much universal following in France.