Plugin Theme: What Difference between 'plugins' and 'extensions' folders

Hey everyone, long time no see! Missed me?
I noticed，I noticed that the official MuseScore plugins 'color notes' and 'courtesy_accidentals' have been moved from the plugins folder to the extensions folder.Do they have any differences?
I am currently developing a plugin. Would you recommend that I study the approach of these two plugins and create my new plugin in the extensions folder as well?