What the heck are you talking about? Chromium is one of the hardest packages to build and it takes forever. Firefox has FAR fewer dependencies. Chromium’s privacy enhancements are a joke.

Easiest way to get going: https://github.com/spantaleev/matrix-docker-ansible-deploy

As a developer the cool thing about Gentoo is you can have a full debugging stack. You can compile every single library and program on the system with debugging symbols and source and you can trace an issue all the way through. It’s really not possible to do on other distros. Having learned a bit more about gdb when debugging, it is really cool.