It was time for the F-14 to go. It was an obsolete design by the 90s in regards to air to air combat.
F-14s used to have mock engagements with German Mig-29s. The only time the F-14s would win is when the Mig-29s would over-g and have to end the engagement.
F-14s were used more as Foward Air Controllers than they were as attack aircraft. When minimum altitude restrictions were in place over hostile territory, the 14 could use its LANTERN or TARPS pod to help identify targets. Then F-18s would be called in to attack the targets.
The F-14s huge, energy burning airframe was also a setback. In one instance in the Serbian air war, an F-14 was trying to evade a surface to air missle. After two or three turns, the F-14 ran out of airspeed and energy. The pilot reported watching the missle coming straight at him, not able to maneuver out of its way. By divine intervention, the missle exploded about 100 yards away.
Something would break on the Tomcat on every launch.
Source: "Black Aces High"- Chronicles of the F-14 in the Serbian Air War.