Interesting conversation, however I strongly feel that Steem is not at any risk of being dethroned as a social media platform, OR for that matter just as a successful platform which can handle millions of transactions, it seems to me that Steem has room to grow, through SMTs, into more of an EOS killer, than EOS has to grow into a Steem killer.
But hey, I love steem, and I love EOS so lets just all get along. :)