I mean, yeah, I understand this argument, but it still defies all common sense. My years of following these debates have only reinforced my initial belief that GPL is a fundamentally incoherent and therefore sucky licence, and that it is a crying shame that WP got lumbered with it when there are saner alternatives out there. I wish somebody could build a time machine and tell Michel Valdrighi what a mess his decision was going to make years down the line.