If we look at the two main operating systems Google and Apple, they operate a model whereby your apps are stored in the cloud for you.

Google is totally setup this way, meaning that it’s not possible to have a local copy on your pc. Apple uses iTunes to store a copy on your pc but also offers it stored in the cloud. With iPhones now you can select not to use a pc and just work using the cloud.

With my android and Apple devices I have encountered situations whereby the app I want to download doesn’t exist anymore. Fortunately with my iPhone I waa able still sync to iTunes on a pc so I was able to reinstall a particular app not available any more. I wasn’t so lucky with my android phone. I would have also been in trouble if I had just synced my iPhone in the cloud. As once the app disappears from the respective app stores, that’s it.

Maybe the cloud storage needs better backups. Also what happens if the cloud gets hacked and your music is deleted?