Comment by ndepoel

Here's another: code was open sourced with every intention of becoming a thriving community-driven project, but in practice users only take from the code what they want for their own needs and never contribute back, or expect the maintainer to solve all of their integration issues for them. Eventually, the maintainer decides that they have better things to do than fixing other people's problems, and that there is more value to be had from bespoke contract work. Some updates still get pushed but over time the project gradually gets abandoned and the open source dream slowly passes away.