Earlier quoted context omitted.
They certainly know how to sell their database. Whether this translates into an equal success with their Sun IP has to be shown. The good thing for them is that they acquired pretty mature products, so they can probably "coast" along and still make a reasonable profit. It's still open whether they can foster enough innovation to keep things going with Java, Solaris… Their track record isn't very good in that respect.…
ZFS, however, is not in that category, and everything I've heard says that it needs more work and a lot more polish.
Also, Jeff leaving doesn't necessarily mean that ZFS is dead to Oracle. Maybe he left because they decided to focus more on btrfs, maybe it's just a personal issue.