Rust Developer words and actions do not align

Sometimes in music there are irregularities,
keeping audience awake. While learning, sometimes those need to be manually checked using piano.
Perhaps from the author himself, herself, if unsure about note or word.

Still, learning a song can be done. No need to say to the composer:
don't do anything, until we have checked it.

So in this case, either lower level library is written in C or in Rust.

If it is possible to test and develop the lower level library independently
and practically via abstractions, without modifying upper level library,
then the maintenance of lower level library is more practical.

Lower level library author is aware of constraints, perhaps not all.
Author is used to test code by compiling and running it.

Some cases need tight co-change with Rust and C changes at the same merge request.
So minimizing this kind of tight coupling could
improve productivity. Documentation advances?
Remaining cases: better tooling could be considered.

My opinion is that Rust safety is becoming a baseline
for program robustness. C held that position before. It took it from assembly language.
Thus it is good to not lower that baseline either.

I don't know how to unblock the progress. Sometimes there need to wait a bit
and then retry, or meet face to face at a right time.
Shrinking productivity gaps, when identified: no need to wait for those.