I assume that native and viper will not require Micropython to run and that Bytecode-interpreter is mainly for quick testing, right?

Aaah I see now. Thanks for the info. MY main  concern about needing the main program to run something is when the software takes like 40% of the calculator memory but that is only really an issue with the regular 83+ and older Nspire models I think and sometimes the file size or dependency is necessary.

Do you have more files than before? I noticed that when I have a lot of files on my calculator, the documents menu takes much longer to open and starting stuff takes longer too.

Also, how hard is it to make an on-calc editor/compiler?

Vogtinator is already working on that: http://www.omnimaga.org/ti-nspire-projects/pywrite-python-script-editor/

Well, there's already some kind of "JIT" available, btw.
(See the examples)

(Edit : It's native code emission, IIRC - look at "@micropython.native")

On my Nspire CX CAS it take about 5 seconds for python to start, it didn't happen before...

Yeah, I know that happens sometimes. I'm not sure why and where this happens, but it's not really a big issue.

Aah good. I see that that's only a script editor though (which is already awesome). I reckon that a compiler wouldn't be too hard, either.
If everything goes on-calc, I could see this become a kind of Axe.

Compiling isn't possible, but that shouldn't be an issue as micropython translates fast enough.

(We'd still need some way to create graphics, though )

ConvertImg?

Do you have more files than before? I noticed that when I have a lot of files on my calculator, the documents menu takes much longer to open and starting stuff takes longer too.

It's not even fragmentation, it's just that the NAND is really f*cking slow and the filesystem as well. I would understand if it was writing being slow, as it has to be reliable, even if you pull the battery or reset during saving.

awesome.
Then. the most important question for game programmers:

Does It Have All Keys Repeat?
if so, I might make some programs using this (and learn python)

Apart from a gets like "input()" function there isn't any input handling right now. I'm not sure how to do that, probably "isKeyPressed".

Aah good. I see that that's only a script editor though (which is already awesome). I reckon that a compiler wouldn't be too hard, either.
If everything goes on-calc, I could see this become a kind of Axe.
(We'd still need some way to create graphics, though )

Python is an interpreted language, there is no compiler for it.

Not to mention in the case of Micropython, I think Vogtinator mentionned that there's a compiled mode or two. It really depends of the language and platform I guess.