"Also it seems like every new posting on the Main forum has been seen before - deja vue?"
It's innovation stall, happens to everything. There's only so much you can talk about as far as building panels and cabinets until there's more innovation. Think about the hobby for the last two years, the only thing that has majorly changed is the software and some new ideas like spinning CPs. Everything else is new twists on old problems, people seeking opinions, and troubleshooting posts. I think that's why people check this forum more than the main thread, there's not much new going on there.