If you pick up any Linux distribution, you will most likely come to the conclusion that the newest version of mod_wsgi available is 3.3 or 3.4.
Check when those versions were released and you will find:
mod_wsgi version 3.3 - released 25th July 2010
mod_wsgi version 3.4 - released 22nd August 2012
Problem is that people look at that and seeing that there are only infrequent releases and nothing recently, they think that mod_wsgi is no longer being developed or supported. I have even seen such comments to the effect of ‘mod_wsgi is dead, use XYZ instead’.