.. but people ARE maintaining the implementations and tooling even if the spec might not be getting new features aside from extensions. There's a difference.

Look at Mesa release notes for example, there's a steady stream of driver feature work and bugfixes for GL: https://docs.mesa3d.org/relnotes/25.2.0.html (search for "gl_")

A slow moving graphics API is a good thing for many uses.

People are writing new OpenGL code all the time. See eg HN story sumbmissions: https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...