It's like building a house of cards. The most solid platforms are open standards, like HTML. Other platforms may be shakier, especially if they're controlled

It's like building a house of cards. The most solid platforms are open standards, like HTML. Other platforms may be shakier, especially if they're controlled by a single individual or a single company who can change their mind at any time. If you build your business around open standards you're less likely to suffer from changes in terms of service of "platform providers".