What will happen next? Will the social media get stronger and stronger to replace blogs and forums that no one can defeat?
Years ago I was talking with a friend about RSS/Atom feeds because I still use this technology and at that time I was looking for a better RSS/Atom reader. My friend told me that they no longer use RSS/Atom reader because most of the things that they are interested and are important will arrive at their "electronic mail inbox". By "electronic mail inbox" I mean e-mail, Twitter feed, Facebook feed, Slack, WhatsApp chat/group, Telegram chat/group, Signal chat/group, ...
Back to your question, I think the new generation has a different perspective about information and how to deal with it. The old generation only received a few paper letters at their door step each week so they had time to have a look on the content of each paper message. The new generation receive so many electronic messages every minute that they just don't have the capacity to have a look at each message and they are happy with it. If something is important, it will show more than once at their screens.
And what will happen to the forums and blogs?
I think that forums and blogs will survive because they offer a different service than Twitter/Mastodonte/Facebook/... For example, if you want a drink/coffee/tea/beer you can go to a generic place (social media) but if you want a Starbucks coffee/Whittard of Chelsea tea/BrewDog beer you probably need to go to a special shop (forums and blogs).