This reminds me very much of 1970s Unix. Unix was also an research exercise into OS and userland minimalism and a new, streamlined language (yes, C) that created a new niche in the "like asm but better" space.
In other words, it had nothing in common with today's Linux. (-:
Indeed, much of Mu's design was motivated by the question, "if we imitated the codesign of OS and language that led to Unix and C, given what we know now, what would we create?" This question doesn't seem to be often asked in recent decades, with languages and OSs evolving separately.
In other words, it had nothing in common with today's Linux. (-: