From my point of view it's less commercial vs non-commercial (though I think most of the problems either stem from, or are aggravated by commercial factors) as much as it is diversity versus consolidation.

Ten, fifteen years ago there was a greater number of varied forums and social gathering places with a greater number variety of viewpoints. Now while there's the odd vb bulliten board here and there you have fewer and fewer populated forums -everything seems to have coalescened (socially speaking) into twitter and facebook.

Basically, from my point of view, Social Media has consumed the rest of the social internet (meaning forums). I think there's more than one cause for that but that's what I see as the main thing making the past superior to the present -the ability to not just have your own place, but to have a chance at it reaching out to more people than just you and your friends.