Eugenia LI dislike how easily #Gnome #extensions break between versions. Their API must freeze and backwards compatibility must be maintained, because objectively, there isn't a single user today who is not using extensions. Because simply, the system is unusable without them.
Gloopsies 
@eugenialoli gnome extensions don't have api per se, they basically change the gnome implementation itself (not exactly but close enough) so it's not easy to make an API for that. If gnome made an extension api it would be way more limiting than the way it works now