I can see that on this forum or probably anywhere else there is little interest in 'Mma on Pi'. When i learned the language, Mma was available on full PC's only and on the go one had to resort to handheld TI calculators, apart from bulky laptops back then. I wouldn't carry a laptop, only to have some math power on me. I felt lucky when Wolfram published the WolframAlpha, it gave us some math power on the go through a web browser. And when smartphones became popular they made a mobile app version of WolframAlpha, super cool great stuff!
Finally i have a full Mma installation on my smartphone thanks to Pi. I haven't done much with Mma lately, so i won't make too much use of Mma on Pi but sometimes it is not all about utility in life but about wanting and desire. Ask your fiance what's the actual utility of a jewellery ring? It has no real utility other than it looks nice, makes you feel better about yourself (because it looks nice and it is expensive, $$$ valuable), and reminds you of the past, present and promises of the future. Having a full installation of Mma finally available on a smartphone may have no real utility either .. i don't enjoy coding Wolfram Language on a smartphone screen or on the go for that matter. But i always wanted to have
that possibility. Just have. Ownership. Possession.
Now i have it and i love having it, even though i don't use Mma much anymore and would not code a Mma program on the go. Not on my smartphone screen.
Mma is certainly the most powerful programming language for prototype programs, spontaneous little programs. It operates at the highest level. Deep down, the core was built in C or C++ afaik but nowadays the Wolfram programmers and developers program in Wolfram Language (aka Mma) and don't need to go down anymore.
Thanks and greets to Wolfram and the Raspi Foundation for having made this possible. Mma on Pi, and even free. So cool.