Rust in general, and pyca/cryptography dependency

[vielmetti]

• see Dependency on rust removes support for a number of platforms pyca/cryptography#5771

The Python "cryptography" package discovered new dependencies
on the Rust programming, and as a consequence several of their
previously supported architectures were degraded to Tier 3 support
or made completely unsupportable.

[kpcyrd]

I'm not sure this is an availability issue instead of "new release has additional build/runtime dependencies".

[adityasaky]

This is an odd one; from the thread, it seems like folks were blindsided by an update to cryptography which broke their build systems, and this could indicate an availability issue because the new dependencies were missing. But I think it's more of a problem with versioning? I wonder if users either didn't pin to a particular version of cryptography, or used a rule that allowed the newer version to be used. Significantly, cryptography doesn't use semver. On a side note, they also somewhat recently changed their version scheme, causing them to go from 3.4.8 to 35.0.0(!!!).