> Intel BayTrail chipsets are well supported by some distros such as Fedora nowadays
Sorry, I meant Braswell. At one point, Installing other OS on Braswell damaged its speakers[1] which are now resolved with latest Mr.Chromebox's firmware + OS level fixes. There are still issues with Microphone even with GalliumOS.
Also ChromeOS has Chrome Multi Touch (CMT) touchpad driver which is much better than default driver and are included in Gallium OS, But since GalliumOS is not developed further it's better to go for other OS.
> Does the ChromeOS hardware come with additional quirks?
I understand that you question was related to Intel BayTrail, But I'm using it to mention that there are certain hardware deviations w.r.t Chromebooks like inclusion Google Security Chip (GSC)[2].
Is Braswell hardware reasonably common outside Chromebooks? AIUI, Cherry Trail (e.g. MS Surface 3) was released alongside Braswell and is now well supported in some mainline distros at least.