VSCode is more functional and uses less resources than a comparable open source C++ editor, for example QT Creator […]

QT Creator is a full blown IDE. It would be more fair to compare it to Visual Studio, not Code.

Both are full IDE’s though, to be fair. QtCreator even has a RAD for Qt which is really convenient.

Why do you say Qt for Linux isn’t good? All the Qt programs (and KDE) I’ve used on Linux worked great.