Remember, though, that the binaries deployed in production environments are not being built locally on individual developer machines, but rather in the cloud, as reproducible builds securely deployed from the cloud to the cloud.

Modern language tooling (Go, Rust et al) allows one to build and test on any architecture, and the native macOS virtualization (https://developer.apple.com/documentation/virtualization) provides remarkably better performance compared to Docker (which is a better explanation for its fading from daily use).

Your "trend" may, in fact, not actually reflect the reality of how cloud development works at scale.

And I don't know a single macOS developer that "lean(s) on the team member who is on Linux" to leverage tools that are already present on their local machine. My own development environments are IDENTICAL across all three major platforms.