This has been discussed numerous times, and I've probably been the main cheerleader for doing so. Here's one thread:
https://eccie.net/showthread.php?t=1907625
But I have finally decided to quit beating that dead horse. It's not going to happen because management isn't interested n making it happen, and, even if it was, there's not enough interest.
From the thread cited above:
Fort Worth is the 15th-largest city in the United States, and Arlington is the 48th. But the Metroplex remains Dallas-centric, even moreso in the hobby world, and on this site. It's definitely a chicken-or-egg question: Is the board Dallas-centric because TC guys don't participate as much, or do guys not participate because the board is so Dallas-centric? We tried a private Tarrant County forum for a while, but, although we had more than 500 members, it was the same 10-15 guys who posted.
The forum just never reached critical mass. I'm thinking we probably would have had to get at least 1,000 members, maybe as many as 1,500, in order to make it a valuable resource. The interest isn't there.