[toast0]

> They could always move to a compatible license?

Linux and OpenZFS are pretty much locked into their licenses, regardless of what people might want today. There are too many contributors to Linux to relicense, and while OpenZFS has fewer, I don't think there's any reason to think Oracle would relicense, given they went back to closed source with Solaris and ZFS on Solaris.

> It's a project that doesn't want to interoperability with Linux.

Regardless of the original intent of Sun in picking the license, it's hard to imagine a project called ZFS on Linux (which was merged into OpenZFS) doesn't want to interoperate with Linux.