There is no need to speed anything up, I have first hand knowledge that kicad devs are working on it. They also were always clear that this is not stable API and never defended bindings as a choice as opposed to proper API, it just was not a priority to rework it until now.
Complaints were rightfully dismissed because plugin authors were given adequate warning.
You can argue that users that grow to like and depend on plugins are not aware of this and their complaints about plugins not being updated fast enough to new kicad versions are valid. But it’s all volunteer efforts, you’ll never be able to satisfy everyone.
And progress is made in the right direction, look at where kicad was just 2 years ago. As a plugin author myself, a stable API can’t come fast enough, as a kicad contributor I understand it’s a lot of work.
PCM solved important issue of discoverability and ease of installation of plugins. It’s the main reason we even hear so many complaints about api instability - users are now actually using plugins.
Arguing about semantics and what should and shouldn’t be called API doesn’t move the needle. New api is being worked on.