Maintaining Gentoo ebuilds for complex packages such as Chromium is as peak Linux as one can get. You're talking about developers who _often_ discover and then submit upstream patches for the most obscure and difficult bugs that upstream projects haven't heard of. Often because Gentoo users are the only ones trying different compilation options, or they're the first to try building with more modern dependencies than the upstream project has yet attempted.
For just one of many examples, see [1] where the Gentoo developer had to submit a patch upstream for a Chromium build toolchain bug that to 99% of experienced Linux users is bordering on unintelligible due to how much specific knowledge is needed to understand the bug.
For just one of many examples, see [1] where the Gentoo developer had to submit a patch upstream for a Chromium build toolchain bug that to 99% of experienced Linux users is bordering on unintelligible due to how much specific knowledge is needed to understand the bug.
[1] https://bugs.gentoo.org/956054#c2