You mean eleven? There are 10 SATA ports plus the SATA Express next to the two upward facing SATA ports. It's not bad, but I'm also not planning on upgrading any time soon. If I buy more drives then a hardware RAID card will be on my list of things to get. Fortunately skt2011 has more than enough PCI-E lanes to share if that becomes the case.
Also I would like to wait until the kinks are worked out of DDR4 first, once issues have been identified. I didn't invest in DDR3 when it first came out and I won't for DDR4 either for the same reason. Also, why upgrade? My 3820 can handle just about anything I throw at it and there is an entire lineup of SB-E, IVB-E and Xeons I can drop into this board, so all in all, I don't feel like I would lose much by not upgrading the platform. The P9X79 Deluxe has been pretty solid for me so far.
If you already had a skt2011 machine, I don't see many reasons to upgrade other than having the upgrade itch.