Oracle acquired Sun, so they could have solved it by just choose another license moving forward. One gotcha is the ZFS (Solaris core) team vehemently resisted

Oracle acquired Sun, so they could have solved it by just choose another license moving forward. One gotcha is the ZFS (Solaris core) team vehemently resisted anything GPL-compatible. Something like a BSD license would make the most commercial sense. Instead, Oracle has a consistent pattern of losing community goodwill that loses customer interest and pushes developers to fork.