One of the things I like about hybrid apps (Cordova, Ionic, etc) is that this is a solved problem since you basically develop on top of Chromium (Android) and WKWebView (iOS). I already do heavy use of SVGs on mobile apps for everything, including animations, and I'm quite happy with the results and the workflow. No more asset-hell, everything's a vector.
Design once in Illustrator (export SVGs) -> Code once -> Run everywhere
Design once in Illustrator (export SVGs) -> Code once -> Run everywhere