Well, I don't see the value in having multiple UI platforms in the first place. So I would rather have one very good UI toolkit for all platforms than having a lot of pros and cons for all the native toolkits.
I think the most common place to find people with your opinion is in mobile app development. And I in my opinion there are two major reasons here at work:
1. Apple is very good at building UIs
2. Mobile devices are comparable weak in processing power, while their use-cases mostly always require an instant & animated result.
So on the one hand iOS users expect the same quality when you build a custom UI and that is hard to match when you start with a UI project. The second reason might be the cause why web-based UI are kinda hard to build for mobile apps. I mean I heard a lot more mobile developers complain about web-app performance than desktop app developers. But maybe that is just because of the different rendering engines.
I think the most common place to find people with your opinion is in mobile app development. And I in my opinion there are two major reasons here at work:
1. Apple is very good at building UIs
2. Mobile devices are comparable weak in processing power, while their use-cases mostly always require an instant & animated result.
So on the one hand iOS users expect the same quality when you build a custom UI and that is hard to match when you start with a UI project. The second reason might be the cause why web-based UI are kinda hard to build for mobile apps. I mean I heard a lot more mobile developers complain about web-app performance than desktop app developers. But maybe that is just because of the different rendering engines.