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Raspberry Pi Pico 2, our new $5 microcontroller board, on sale now
(www.raspberrypi.com)
This is a most excellent place for technology news and articles.
Idk about took off but it was a successful product by reasonable standards. I have a few of them and chose it for a product that ended up going nowhere. That was partly because of hardware add-ons available for the pico but not for comparable boards. The existence of that 3rd party hardware ecosystem itself shows that the pico did ok.