The disappointing fact about the current state of mobile apps is that companies no longer think it's necessary to build two native apps.

It shouldn’t be. We never want to build the same app multiple times. What I (as a developer) want is for OS companies to stop with all the proprietary crap and cooperate so I can write an app once. Web apps and web-as-native (and previously, cross platform GUI frameworks) are our reaction to this lack of cooperation.

See also: compilers, libraries, ORMs, autotools, Docker, ... We as an industry go to extreme lengths to work around crap that’s incompatible for no good reason.

It's incompatiable for a good reason, the reasons just don't benefit us. It makes Windows/various vendors extremely wealthy to have bizarre lock in arrangements.