I largely agree with these opinions and dislike the cronyism that is a part of this deal. Looking at it a bit more holistically and seeing the growth of the DFW metroplex from 1980-now though, I think it makes sense for DFW airport to have succeeded. Having the very centralized airport with (theoretically) good rail service to both major cities makes a heck of a lot of sense and have been a good thing for the DFW economy. It would be nearly impossible to build the airport as it is now post that growth, but there's a good chance it wouldn't have survived in the early days given how far out there it was in 1979.

So short answer, I hate the cronyism, but many of the positive end goals marketed here ultimately did come true here. And it didn't fully kill DAL or Southwest in the end.