Well, I have purchased Sola tokens (price has since crashed) and seen their platform develop. Still immature though. I do not think they are trying to replicate Steemit; but at least it is more competition for the mainstream stuff.

Recently I joined Trybe; clunky - still on word press. Will be more "moderated" than Steemit. Based on EOS. Will Steemit move to EOS?

On the face of it, I would be more inclined to build on these other two platforms rather than get involved with more Steem communities.

However it is early days and who can see future develpoments? Especially once more of humanity quit the mainstream social media.