My main test for a UI framework is if I could solve the hardest 'widget/interaction/perf' problem and if I need to make that myself or need to just tweak it. F

My main test for a UI framework is if I could solve the hardest 'widget/interaction/perf' problem and if I need to make that myself or need to just tweak it. For example, because I work on business apps, I need a solid "DataTable". Na dit needs a lot of features to be useful. And need to be fast, so my 1sec queries run in 1sec, not 10secs. So, look for what is the hardest problems then which UI toolkit solve them.