A lot of cars back then were junk. I can't think of a really bad new car today, some of the Dodge's don't impress me, but I wouldn't consider them junk.
There are cars I don't like because they favor form over function at a high price like the Mini Cooper and the Fiat 500, but they are not junk, IMHO.
I don't like the Camaro because you can't see out of it, it feels like being in a vault. I was considering a convertible when the wife said she wanted one. Fortunately she backed off that request. My preference was a BMW 240i but they get expensive in a hurry. I like that car a lot. We both like the GTI, but we rarely have the sun roof open, which is a sign I think we'd rarely have the top down with a convertible. I wouldn't put the top down to go to the store.
I've had rental Mustang convertibles, the last was the 4 cylinder with the 10 speed. It was fun in CA to have the top down but I didn't not like how it drove. It seemed very down on power, and yes it likely had regular grade gas in it, but it was slow. The transmission seemed confused often as not.
I'd prefer the Mustang over the Camaro for practical reasons even though the Camaro drives better on a track.
Yeah, I'd track it about once in a never.
