> Why doesn't Amazon and friends just make a dist that is not tied to Red Hat?
Because RHEL is a known distro many vendors test for and allow. Having compatibility with it is a huge boon for adoption, since you can just use lots of software. If you do a distro from scratch, you're on your own.
This. Amazon probably believes that doing their own distro would be both harder and more expensive.
Amazon is already releasing Amazon Linux AMIs which are similar to rhel, but you're not supposed to expect any compatibility. They're branching the behaviour off when needed.
It's hard to know design about compatibility between Amazon Linux and RHEL. It seems that Amazon Linux no longer targets full RHEL/Fedora compatible, but it still support EPEL. Anyone know good documentation?
Why doesn't Amazon and friends just make a dist that is not tied to Red Hat?