I understand your point, but I'm intrigued. Could you elaborate with some kind of example why it is disappointing that people don't date their web-pages? Is this a generic problem or is it with specific web-sites only?
A recently-released project may be intriguing but something risk-averse entities (individual/organisations) might prefer to hold back on for fear of, let's call it "infant death syndrome".
An old project with no active development is generally perceived as "dead", with risks that security- or bug-fixes could remain unaddressed for long times, or that there may be current zero-day exploits possible.
An old project with a healthy activity stream counters both points: the project has exhibited staying power and addressing ongoing maintenance concerns. Even active projects might give caution (say: feature creap or enshittification), but that's beyond the scope of merely giving initial / latest activity timestamps.
NB: I've well over 30 years of professional IT experience in shops ranging from small operations to multi-billion-dollar firms. Advocating for, or against, various technologies and solutions is a large part of that role. It's also something that carries into my choices for my own personal systems.
I'd be unlikely to do much with MinC myself as I don't use MS Windows, though it fits in with a long tradition of similar tools I have used, often with fond memories, including Cygwin, David Korn's UWIN, MKS Toolkit (Mortice Kern Systems, licenced by Microsoft for early versions of WSU, precursor to WSL, I've just learned), VMWare, Xen, qemu, Virtualbox, Parallels, etc. These have different architectures but all basically address the problem of "run programs from OS X on OS Y", which turns out to be a fairly-frequently-encountered challenge. I might well recommend MinC to those with such needs.