Well, you're probably mostly in the ND section...
I've owned my '91 since March 1991. Joined Miata.net in 1999 and hung out with many of the same folks prior to that on the old Prodigy server. Overall, you won't find a better car forum on the Interwebs than the Miata.net forum, even if a few sections are weak. I've "lived" on many other forums over the years, and there's just no comparison for depth of knowledge, willingness to help, access to Miata community experts, and resources. Especially for the NA/NB/NC.
It's just hard for anyone to compete with that. The other Miata-specific forums that do well are focused on more of a subset, like the boosted or racer crowd.
Having said that, I'm finding Mazdas247 to be a pretty good resource for my "new" CX-5 and I expect to spend some time here. But I had the same reaction to this forum as you had to Miata.net, so it may be just what one is used to. <shrug> I found myself going back to Miata.net to get the definite information on the Carplay/AA upgrade, for instance. As of yet, I don't see myself just hanging out here to talk cars like I do on Miata.net. At least over there, I can offer something from 29 years of Miata ownership. Over here, I'm still just a Taker for now. And, admittedly, the CX-5 doesn't generate the same passion for me as the Miata.