You expected highly capable, generic GUI toolkits to show parity with a development environment that has specifically targetted text above all else (though with

You expected highly capable, generic GUI toolkits to show parity with a development environment that has specifically targetted text above all else (though with lots of other stuff and great depth too) for decades? Even in an era of PWAs and highly reactive UIs, the web is still fundamentally a document presentation mechanism. No generic GUI toolkit fits that description (even if they can be coerced into being one).