Not only did Tumblr activity collapse after the NSFW ban, but in the subjects I follow, activity seems to have settled on a niche of transwomen blogging about hobby or interest X, where their posts are mainly about being a transwoman interested in such things and not the hobby or interest itself. I understand that Tumblr has value for those transwomen wanting to express themselves and build community with others, but it has become a network relevant to only a tiny, tiny percentage of the population.