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I also don't understand the different "License" ratings for Qt and GTK, given they are both LGPL.

The Qt licencing situation is way more complicated than that. Parts of it are available under LGPL, parts are available under GPL, and some parts are only available under a commercial license which is a minimum of $5500/dev/year.

There's a big chart here:


But all of the extras parts that are not under the LGPL are things that GTK (nor Electron) doesn't even have, so I would argue it's still an unfair comparison.

I am also baffled by the difference in license ratings. My guess is that some parts of Qt are licensed differently (like their WebAssembly port) and it's not immediately clear which parts are licensed under which license.

Not all Qt libraries are LGPL, some are GPL likce charts.

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