I'm not hating on Framework and I'm genuinely rooting for them but the last part is a bit of a weird PRO to me.

What else can it run besides Windows and insert-long-list-of-Linux-distros-here compared to your run of the mill laptop? Can it run OpenBSD, NetBSD or FreeBSD without issues? How about Haiku if we're feeling crazy?

Something that I think is a better PRO (if we're talking operating systems) is that from what I understand (though I might be wrong) is that you could use the Storage Expansion Card and have Windows installed on it for those moments when you have to boot into Windows in anger due to some use case not served by Linux (Adobe Reader I'm looking at you). Now that's nifty to me.