Blame the gub'ment.
 
 
In 1994, Congress would reject Grumman proposals to the Navy to upgrade the Tomcat beyond the D model (such as the Super Tomcat 21, the cheaper QuickStrike version, and the more advanced Attack Super Tomcat 21).
 
Instead, the Navy elected to retire the F-14 and chose the F/A-18E/F Super Hornet to fill the roles of fleet defense and strike formerly filled by the F-14.