Some additional info and explanations:
Of course it requires knowlege of C and the technology application works on, but that’s not entirely true.
You don’t technically need to be a compsci major to copy/modify code from stackoverflow or snippets from the email archives.
Suckless software is definitely not for all and it isn’t universal (in some sense)
It is universal in that it does things according to specifications and is simple so there’s not a lot to break.
Also not universal because stuff like accessibility aren’t considered too much even though most of that software is text based, so should be compatible with i.e. screen readers.
Elitism may be a problem but it doesn’t stand in a way of user. The codebase is not limited to work only for elitists and participation in the community is not mandatory. As almost always in every community, not everyone in suckless community is an elitist and its based on particular individual.
Gentoo uses it’s own init OpenRC but one can switch to systemd