Warning: talking out of my butt a bit so take with a grain of salt.
I wonder if you could look at micropython. You could implement a unix like world on top of micropython then use micropython as the layer where a normal os would be.
It would be miserable and likely impossible to be fully unix compliant but could be a fun thing to play with. I would be amazed if it ever somehow could run native unix binaries.
Can confirm this type of thing. Under the Microsoft umbrella stuff doesn't get special treatment or exemptions from rate limits.
Instead we make multiple accounts and randomly pick ones to use for various api calls. We waste time fighting with secondary rate limits for them as well as guess how to avoid them.
Boneyard Match