Tomorrow (today!) my experiment is a minimal systemd linux. Thanks, something in your writing reminded me of that, I had just started reading about it last night. My inspiration was the "minimum linux live" project, which of course is not really a practical start point, and would take a ton of work to build up, but none of the tiny linuxes like DSL and Puppy Linux scratch my itch. So I think a tear down is my path forward, then once I find that, start from scratch and aim for that target.