What if you can't afford to hire a "top notch" iOS and Android dev? (or any extra devs for that matter)

You don't think there's a lot of companies in that boat?

I was able to make a react-native app, targeting web first. Took a little under a year.

Took 1 month to get it working and deployed on both app stores to replace the apps our iOS and Android team used to work on natively.

I now maintain web, iOS, and Android, solely, with one codebase, 95% code shared.

We used to have at least two devs on each native platform. That saves about $600k/yr.

(browser-based cross-platform toolkits are a joke, they are not flexible, and are hard to extend)