Earlier quoted context omitted.
I think it's a combination of largely unrelated historical trends (dating to way back, when Qt was GPL-only, and even before that, when it had its own incompatible license). That said, it's interesting that most commercial desktop software for Linux these days seems to be written in Qt, not Gtk. Also, while this is anecdotal, most new projects (as in, started recently, as opposed to old software having new releases)…
> I think it's a combination of largely unrelated historical trends ... Some of the facts are still true. Say for example, Qt is now licensed under LGPLv3, which several corporate hate. GTK+ is licensed under LGPLv2.1+.
Also, there is a paid Qt license if you don't like *GPL.