In reply to Anh Tran.

Getting plugin developers to develop for ClassicPress is difficult, but maintaining a fork is not that difficult. It is stable, and we use SemVer to ensure releases are predictable, unlike WordPress. Version 1.x is an LTS version, so there are no breaking changes. A lot of backports, some new features and improvements. The core is half the size of the WordPress core, which makes things easier and improves performance.

We have a team of core developers doing the work. Small but growing userbase that loves it. Plus, have plans to extract certain features such as XML-RPC, comments, customizer, etc. into core plugins to make core maintenance and development even easier. Not everyone needs those.

Not easy, but doable.