I found out about this today, I'm not sure if it was brought up in the forum before, no topic currently in the front page quite seemed to fit it, and I figure it could be interesting in the context of Mugen creation, if nothing else for the sake of perspective and history:

https://sf2platinum.wordpress.com/

It mostly covers topics like AI and some coding quirks, but even that might prove to be an insightful read for some.