People have been trying to make that work since the 80s. The different interfaces don’t have the same metaphors or semantics so cross-platform UI toolkits are

People have been trying to make that work since the 80s. The different interfaces don’t have the same metaphors or semantics so cross-platform UI toolkits are always restricted to worst-case lowest common denominator capabilities. You see this outside UX too — few programs are written to pure POSIX because usually you want to do more than that core.