Good to see they have woken up and ditched Xamarin (though it's a pity it took Microsoft pulling a Google and killing that stack before Bitwarden acted). Cross-platform mobile app stacks are an absolute evil that need to be avoided: all they do is hide complexity and edge cases until 90%+ of a project is done and the specter of doing what should have been done all along -- either go full platform native or mobile web (or at least hybrid web) -- would be too expensive and time consuming to recommend. In almost all cases a mobile or hybrid web app will suit an app's use case but secure and performant cryptography is one where going native makes complete sense. Good on Bitwarden and I look forward to the upgrade!