Building on platforms isn't a problem. It's actually pretty cool being able to use all these wonderful APIs. The problems start when your business is depending

Building on platforms isn't a problem. It's actually pretty cool being able to use all these wonderful APIs. The problems start when your business is depending on one of them. If what you offer is a product that work on top of 10 platforms, it wouldn't be a big deal if one of them will shut you donw.