That's only partially true. The license is "compatible" enough to be shipped by distributions rather than kernel. AFAIK, the thing is: no one has seriously de

That's only partially true. The license is "compatible" enough to be shipped by distributions rather than kernel. AFAIK, the thing is: no one has seriously decided to test the license compatibility (as in, test it in court) and everybody's essentially scared of Oracle dragging them through endless legal litigation. Oracle owns most/all the IP that came from Sun Microsystems and while ZFS/OpenZFS is CDDL licensed... Who wants to spend millions in legal fees to find out? Canonical did (still does?) ship OpenZFS with Ubuntu but maybe they're not big enough for Oracle to go after them (who knows? the lawnmower works in misterious ways).