Yeah totally, if you're in those kinds of environments, then I agree that a GC is a bad choice of tech.

I say that even though, as you noticed in another reply, I worked on research to try to make GC suitable for exactly those environments. I had some cool demos, and a lot of ideas in FUGC come from that. But I would not recommend you use GC in those environments!

There is a way to engineer Fil-C to not rely on GC. InvisiCaps would work with isoheaps (what those embedded dudes would just call "object pools"). So, if we wanted to make a Fil-C-for-flight-software then that's what it would look like, and honestly it might even be super cool