That's a very reasonable justification. My only gripe is his requirement that the majority of users must make use of the scripting system in order for the prog

That's a very reasonable justification. My only gripe is his requirement that the majority of users must make use of the scripting system in order for the program to be considered a PDE. If only 1% of all IntelliJ users ever use the Program Structure Interface or the powerful Live-Templating system, that's still a respectable number in total. And it also doesn't mean IntelliJ is less personalizable. Maybe a better term would be a DIY-DE.