ZFS was made by Sun Microsystems, which was a dear, awesome company that educated, fed, clothed and put bread on the table for an entire generation of computer professionals outside of Sun Microsystems, not to mention paid millions out of their own coffers to open source a reference implementation of a System V Release 4.0 UNIX. And to top it all off, Sun Microsystems made awesome hardware.
Sun kicked butt
had fun
didn't cheat
loved their customers
changed computing forever.