Interesting that there aren't any ARM based systems that made the performance cut.
ChromeOS was of course notable as a laptop OS on both ARM and x86.
I suspect the whole Ultrabook thing kinda fizzled out as it became apparent that ARM was not getting much traction in laptops (other than Apple, but then, they are always an outlier).
It's a great Chromebook for on the go stuff.
I have a Duet 5 and a Duet 3 (smaller form factor, ideal for reading in bed). I like being able to run most Android programs, and my go-to software suite, Emacs, TeXLive, and various Scheme systems, runs fine on Debian Bookworm. I tried Crouton years ago, did not like it; but Crostini seems to work very well. I rarely notice lag, except sometimes when logging in.
There are some negatives: some Android apps are flaky, and the Linux environment has a few restrictions. And of course the whole requirement to log in with a Google account. But as a daily driver, the device is inexpensive and highly usable.