The exclusive apps are other side of the coin, even. They show that making something that targets Mac is its own job if you're not using cross platform frameworks. With that in mind, it makes perfect sense that people don't want to target Mac, especially if they're not entrenched in or familiar with the Apple ecosystem.

I wonder what the best example of a cross-platform app that uses the native toolkits on the various platforms is.

I’m going to discount/ignore things like browsers.

Which toolkit do you use on Windows