Now that the whole world is convinced that you should use "the cloud" there's no reason to worry about anything. "The cloud" will provide IPv4 addresses for you. Thousands of web sites can live on a single IP address as long as it's HTTP 2.0 or later.
I'm sure hosting providers like things just the way they are. Widespread adoption of IPv6, fiber links, and simplified peer-to-peer protocols might make people realize that "the cloud" is not Google, Amazon, and Microsoft. Oh, and Oracle. I don't want to get sued for forgetting them.