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Why can't we go back to small phones?
(www.spacebar.news)
This is a most excellent place for technology news and articles.
Based on https://postmarketos.org/install/ the Nokia N900 can run the latest stable release of PostmarketOS.
Nokia N900 was a proper Linux-powered phone released in November 2009.
So yeah, it's been getting over 15 years of community support so far.
Edit: Fixed typo