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Scientists move to Bluesky, transitioning away from X and Meta platforms
(www.dailyuw.com)
This is a most excellent place for technology news and articles.
Sorry, should have clarified - I was speaking on the part of many academics. In my department, most people (faculty) have abandoned Twitter and a fair few have started on bluesky although more just don't use the format in any context anymore. I only know of one who uses Mastadoon.