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No, you don't need a 'very bespoke AOSP' to turn your phone into a Rabbit R1 — here's proof
(www.androidauthority.com)
This is a most excellent place for technology news and articles.
Some phones and PDAs from decades ago had a "jog dial" on the side, like a mouse scroll wheel.
It was so easy to roll through menus and just push it to click.
The separate roller and button arrangement this has seems such a poor choice in comparison.