Both, in the best way. BSDs have strength in that the whole OS is in a single code tree, as opposed to the Linux kernel and GNU toolset being different orgs altogether. This makes the OS feel more tightly integrated with itself. More intentional.

You end up with a good set of sane defaults, but still the flexibility to chose what components you want to install.

FreeBSD particularly has the ports tree and good linux compatibility to extend it where needed.

Both have great documentation that will help you get acclimated to the differences between Linux and BSD.

I know you are asking for Linux, but if you like OpenRC, why not try one of the BSDs, specifically FreeBSD or OpenBSD.

If you still want Linux, NixOS or an immutable Linux sound fun.