I wouldn't argue with you. At the same time, for me it comes down to cost and parking space. Plus, I think it would be cool to do a road trip in an old car if I can be as comfortable as I was in my Challenger.
The Mustang is a good option, even the older ones. I wouldn't be opposed to even as far back as a Foxbody. My struggle is, I just like the Challengers so much better.
The reality is, old or new, Mopar or Ford, they all have their drawbacks. Just have to decide which flaws you can live with.