FB tends to be a 'look at the car I just bought' or 'look at the project I just finished' or 'the event I was just at' ego space. The vertical, model specific forums continue to be the place to go if you are diving into detail via searches of existing threads and people helping each other in response to specific questions and more importantly problem solving.
IMO FB tends to be the place to share the superficial, and to reduce sophisticated ideas to ephemera. A significant challenge on the internet generally and particularly FB is uninformed advice - youtube for example is full of parts life endangering how-to videos.
FB is more of a casual after hours clubby bar atmosphere rather than a serious forum in my experience, and i wouldn't go there for advice.