The F-15 entered service in 1974. It's 35 years old. They're breaking in half due to cumulative stress on the structural members. They have flight restrictions on maneuvering due to structural failures. They aren't stealthy. They're vulnerable to SAMs. They don't maneuver as well as the new Russian and French aircraft with thrust vectoring and that makes them vulnerable during BFM engagements.
You're wrong. Delaying the the F-22 puts US Pilots and the US at risk. The longer we delay on the F-22 the more expensive it gets and the higher the risk to US Security.
http://www.ausairpower.net/raptor.html
IIRC, it was 1976 when the Eagle entered service with the USAF, and the 555th TFS ‘Triple Nickel’ (TAC was in existence at that time) was the first Eagle-equipped squadron (it currently flies Vipers and is based at Aviano AB, Italy, under USAFE).
Click on the link above and read the article. It’s highly informative.