64 with a Mustang, that's pretty cool! I bought my first GT as a retirement (military) gift to myself in 2016 then traded her in for a brand new '22 GT. Just turned 57 and love the car.
Bro $1200/year full coverage? Not bad. What state are you in and may I ask what insurance company? I also have a '22 GT full coverage and insurance is crazy here in Washington state.
I have almost always opted for the extended warrantys so by the time of expiration I would just trade the vehicle in and another cycle would begin 😄. Did this with my '16 GT to now my current '22.