Seriously, the good games get abandoned so often, I guess the people who put some actual effort into their projects end up burning out.
The biggest issue with these games is that they're made by inexperienced developers who drastically underestimate how much time and manpower a full game actually takes. They jump into projects clearly meant for full teams, and then wonder why they burn out or abandon them.
To make things worse, there's a complete lack of understanding of how branching narrative complexity works. People keep adding choices upon choices, doubling the content in every chapter, as if they’ve never heard of a geometric sequence. This kind of design is doomed from the start unless you either cut down hard on the number of branches or hire a full team.
But it’s the community that throws money at dreamers with zero track record - then acts surprised when nothing gets finished. So they get exactly what they pay for.