From experience: I work on a small team maintaining build infrastructure for my entire company. My goal, as much as possible, is to maintain a single build environment that can serve all purposes.
But it has proven quite the challenge to support old Linux distros. We have tried using nix to pin deps, but this easily leads to new issues: hardcoded RPATHs leaking into binaries, glibc compatibility issues, etc.
If we instead fork the build environment and use an old Ubuntu for building our Linux app, then my life gets harder, because now I have two targets for a whole lot of internal tooling that my team maintains, and that tooling needs to be deployed to both build environments. Again, its the same shit: glibc mismatches, missing/different shared libraries, etc. Just causing problems in a different place.
There is certainly some element of skill issue at play. But I wouldn't call it easy.
