Just so you are not surprised, the #mntreform is not exactly what I would call a *small* laptop, at least on one axis it is a bit bulky.
All the other features you describe are pretty much spot on, and a few other niceties; notably modular replaceable parts and a wide DC input range!
The boot #firmware requires some DDR initialization blobs, though, so unfortunately not likely able to be fully integrated into #Debian. The #librem5 has the same issue.