My problem with a line array is the expense and the build time.Because of my desire to build using the benefits of tubing as opposed to boxes, and the need for each midrange to have its own separate but equal enclosure, the build time on my system was two years of weekends. I'm talking about 200 man hours.
So when I think of arrays, I can't imagine NOT building the best possible circumstance for the money that I'm spending on speakers, due entirely to the vast amount of time it took to built them.
Its a bias, I know.