And lest anyone think that the 76 line is being retired to make way for an X-2 based commercial platform... that doesn't seem to be the case, either:
Sikorsky rules out civil helicopter using X-2 technology
Anyone familiar with X-2 platforms won't find that article shocking. The idea of a commercial tiltwing that can handle S-76 missions is also a little far-fetched.
Frankly, given Lockheed's vast experience with and deep portfolio of commercial products... I can't say I'm surprised the 76 is being retired.