Earlier quoted context omitted.
That is like a big deal. Also speed.
>That is like a big deal Why you think it is "a big deal"?
So, reducing security bugs means less crashes on weird input, less leaks (better resource usage), just a more stable tool as some classes of bugs (which may or may not be security relevant) are just eliminated completely - that's a big deal as with rust the (runtime-)cost other languages avoiding this is just not there (or much smaller).