Every time Qt is mentioned there is a comment with a licensing question. You don't pay for commercial use as long as you don't want to make secret modification

Every time Qt is mentioned there is a comment with a licensing question. You don't pay for commercial use as long as you don't want to make secret modification to Qt itself. Paid licenses are for a couple of obscure modules. QtQuick + JavaScript puts JavaScript into its original place that it had at the times of the old web: oneliners to bind stuff together. Also there is probably a confusion from Qt having two distinct GUI systems: QtWidgets and QtQuick.