The downside of xamarin is slightly unstable tooling, the occasional regression, and headaches associated with using native oss libs, though it is very much pos

The downside of xamarin is slightly unstable tooling, the occasional regression, and headaches associated with using native oss libs, though it is very much possible. And of course price. On the other hand, native-equivalent performance is no joke and c#/f# are great languages. Xamarin comes with some very sophisticated stuff like databinding, and high-level concurrency like rx, async/await, and akka.net which can really be a boon for performance, especially compared with js's comparatively meager concurrency options.