Can you elaborate on what kind of apps are you developing and where you are getting good reuse? My apps are generally heavy on the UI and moderate data and I'm wondering where the sweet spot is.
I've been doing Xamarin for about 6 months and I get most of me reuse in services. Sure, manipulating the UI is mostly native code but the rest can be reused such as the DB layer, API layer, and anywhere else you have business logic.
Enterprise mobility mostly; moderately heavy on UI (UI standards in the enterprise are rising, particularly for mobile users), but I generally find the bulk of reuse is in workflow, local persistence/offline storage + data synchronization + security/encryption + enterprise infrastructure integration / cloud & "other" services integration (e.g. CMSs, CRMs), etc.