This is not like a web browser, Bambu Studio requires the networking plugin to function, it explicitly depends on the services provided by a specific plug-in th

This is not like a web browser, Bambu Studio requires the networking plugin to function, it explicitly depends on the services provided by a specific plug-in therefore it's not a plug-in at all, except in name. What you're describing is probably a gray area, the closest example I can think of is the Wordpress plugin ecosystem (GPLv2+).