I'm with you on the sunsetting of ChromeOS, but I'd like to offer a counterpoint to your experience of the Duet. I've been using the newer Lenovo Duet 5 with PostmarketOS[0] (linux for ARM) as a daily driver for more than a year and it is almost always great (minus no functioning webcam, which is abysmal anyways)!
[0] https://postmarketos.org/