One thing that may influence it is the readily available tooling for web developers to easily build cross platform apps with web tech. This technology exists on

One thing that may influence it is the readily available tooling for web developers to easily build cross platform apps with web tech. This technology exists on the desktop too, but I feel like it's not as well recognized. You can build your frontend in reactjs and your mobile app in react native and share a lot of code between the too. I can't think of another option that works together quite so well.