I think that I understand what you’re saying: it’s MEPIS (and now MX Linux) are very solid, reliable solutions, but they’re so complete that you really don’t need to tinker with it at all, unless you WANT to do so. I get that.
While Debian doesn’t FORCE you to constantly tinker, it’s one layer closer and you can get very close to the direct interface to many things. Ubuntu definitely goes too far for people like you and me; using metapackages to an extreme and allowing very little flexibility; that may be great for some people who do not want to tinker at all, but unless you practically rewrite it, you have limited flexibility.
While I think that MEPIS and MX Linux do provide a lot of that flexibility, I understand your point.
My favorite distribution, antiX Linux, does things a LOT like Debian except for the reliance on systemd - the antiX developer despises systemd, so he’s worked for a decade to get rid of it entirely, finally succeeding a few years ago. It means that every time Debian inserts a systemd dependency into ANY package, he has to replace it and that’s a signifcant task, but it’s one that he (and a few of his like-minded developers) have mastered. I help moderate the antiX Linux forum so I have some of that bias too, but I do also use other distributions; MX Linux isn’t 100% nosystemd; a developer named ProwlerGr helped them bring back sysVinit as an alternative to at least reduce the number of routines dependent upon systemd.
Regarding CachyOS, I was really enjoying it for a while, but it went through a few rough patches, similar to the ones I’ve seen with Manjaro Linux, so I’ve found Endeavour OS to be an outstanding alternative to CachyOS; it’s just a little bit more conservative, thereby increasing the reliability and stability, plus they have a really wonderful forum.
I’ll say this though: even though we all have our preferences, and I’ll certainly state mine, at the very same time I am a HUGE advocate of personal choice, so if someone wants to pay a company to produce a commercial system, while that’s not MY choice, it’s their choice, and who am I to challenge their choice.
Bringing that right back here, if someone prefers CachyOS, MX Linux, Slackware, Tiny Core, Slitaz, Puppy Linux, FunOS, ZimaOS – fill in the blank - that’s why they are there. It’s fine; I’m not going to use or even try all of them, but I’m thankful that we have this many choices - and it’s our individual freedom of choice to use or not use whatever we personally choose, and that’s my biggest soapbox in the technology space.