To explain, I'm sort-of co-maintainer of the stb libs at https://github.com/nothings/stb. I say "sort of" because the way that originally worked is that Sean and I are friends and years ago Sean said "can I add you as maintainer to that repo in case something happens to me so it's not completely orphaned" and I said yes.
So I find myself the "emergency contact" for 20-odd libs, some of which I have used myself, most of which I have not.
Both Sean and I have full-time jobs doing other things, both of us have limited spare time, and realistically, either of us is actually willing to spend about 3 weekends worth of time in any given year on stb library maintenance.
And both of us keep getting angry/snide comments from people who fundamentally don't understand this.