Earlier quoted context omitted.
My understanding is that the Chromium folks handle security issues with: "version x.y.z is vulnerable, please update to (x+7).(y+25).(z+2), as it is the only supported version – the fact that the diff from x.y.z is 100 kLOC and touches mostly completely unrelated things is your problem". This isn't sustainable open source development in any practical sense. Sure, it's technically open source, but nearly useless for a…
Arch has been handling minor releases on Chromium just fine. If Debian is having issues, it is most likely with them trying to backport fixes into antiquated code bases.
Debian has a release model for a reason and it's their raison d'etre. Of course they don't want to compromise that.
Considering the amount of other distros that use them as a base they're providing something that people want.