The transition is more from 68k to Nspire.
If they wanted to push all z80ers to Nspires, they wouldn't have spent time&money making the 84C
![Tongue :P](https://www.omnimaga.org/Smileys/classic/tongue.gif)
Anyway, I don't know why they don't allow programs to be running from ARC. Maybe there can be some technical issues ? I really don't know anyway, that's not my area
![Tongue :P](https://www.omnimaga.org/Smileys/classic/tongue.gif)