Well, if not the Steem blockchain, it might make a good example for more projects coming in the future. Facebook is still holding strong in spite of the criticism. Almost everyone who has technology has a Facebook account (billions) while there are only a few hundred million users on the Steem blockchain (who might have left and have never used it).
But regardless of size different, it is true that the ages are shifting and something new may come to replace it any time.