@JoshJers @eniko To some extent, it's making me realize that Texas Instruments doesn't get that kind of rep, and it feels like maybe they should've tried for it.

Like, "Yes, we have a new version of our TI-Nspire models, but they will still run that program of Doom from your father's TI-83 if you upload it to this new calculator model, no changes to the code necessary.".

I have a feeling they didn't do that.