I spent most of the last ten years in Atlanta and tried the full gamut of coworking, Meetup and networking options, which are extensive. But it’s very much as jwr said - very few of those people are truly flying by today’s bank balance, bootstrapped in the most literal (and perilous) sense possible, so nobody really understands where you are and presumes you have time for the same BS people with some kind of funding or employment do.
Plus, being in an obscure niche means nobody understands what you do, or much cares. Telephony ain’t sexy, and most specialised things that cater to very particular intra-industrial needs aren’t either. There is a small coterie of people in ATL with whom I can have fulfilling conversations about VoIP, and many of them are among my customers already. The chances of that happening at a generic business networking event are substantially zero.
So it’s not that one has literally nobody to talk to, anywhere. There just isn’t much of a support system given these two factors. It’s very rarefied, and one must develop a high tolerance for toiling in obscurity and the loneliness that comes with. Some developer types don’t mind that, I gather, but if you’re used to and generally enjoy working with humans, it’s really tough sometimes.