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If current trends continue

A screenshot of the similarweb website, It shows the right end of a graph that is going down, the rest of which is not in the screenshot, and a rank list of "similarly ranked sites" where Tumblr is eleventh while twitter is ninth, between them is nextdoor.comALT

Twitter will eventually be beaten by Tumblr

Not because of any virtue of Tumblr’s, of course, but it will be beaten nevertheless.