According to this source
, LGA 2011 will be on-par with Haswell until EOL and Intel is likely going to hold on to support of this architecture along with 1150 because the socket was promised Ivy Bridge-E a very, very long time ago, causing investors in the server market to move on to the platform.
They are obligated to keep the life extended after the release of Ivy Bridge-E as well as the Xeon counterpart.
I source that here: Inline | PC Perspective
where you see Ivy Bridge-EP.