As cool as a native code back-end for Bitwarden would be I would be more interested in seeing vendor native mobile apps (Swift/Xcode, Kotlin/Android Studio) and putting the Xamarin code out to pasture. Would also like to see an improvement in the desktop Electron app as well or at least get it to feature parity with the web vault. All of that said Bitwarden is a fantastic product and I recommend that over every other server-based password manager out there.

The bitwarden mobile apps are using Xamarin? That's actually pretty impressive...I've never had any of the weird issues with the bitwarden app that I've had with other Xamarin apps in the past.

The desktop app looks and feels like an electron app, so I'm far less impressed by it. At the very least it would be nice to have it in Qt or something like that.

I will freely admit I am strongly biased against Xamarin as there are so few cases where I think it's unequivocally the right choice, and Bitwarden isn't one of them. It would make more sense to take the work done in their desktop electron app and use that as part of an Ionic hybrid mobile app than to screw around with the layercake of bugs and mismatched APIs that Xamarin is. Moreover, since this is a serious app from a security point of view it really should go full vendor native IMO.