I built meepr recently. It's basically twitter v1, but the hashtag system is gated, it builds a knowledge base of what you talk about and how deeply, and then enables you to post into/create hashtags, think of twitter meets reddit meets quora? Feel free to follow me and share with your friends. No recommendations, no algorithmic timeline, no ads etc. Just regular old micro-blogging with a small twist. https://meepr.co/je

The other thing I built but am less interested in personally just through should exist, is something like MoltBook but for more formal topics like the sciences. -> https://ideas.gd/