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Flipboard is abandoning X for Mastodon
(www.theverge.com)
This is a most excellent place for technology news and articles.
I suspect many of them have never heard of it, either. It was default software on some bloatware device I had, either a Samsung phone or tablet or a Lenovo laptop, maybe. I expect plenty of people just accepted that it was there in front of their face and must just be "the news on the Internet".
Can confirm it as bloatware on Samsung Galaxy phones (older ones; I think they stopped adding it recently)