Comment Re:Duh (Score 1) 96
You are correct, but are overlooking a possible solution.
You have an average of N software engineers hired by M distributions to backport features. This means that the cost of those N*M software engineers is already built in.
If you hire the same N*M software engineers as a consortium to fix the flaws and regressions in more recent stable kernels, then the software won't break, there won't be the new kernel defects, AND you don't get the security holes.
Cooperation upstream would mean less kernel differentiation, sure, but that's not what most enterprises go by anyway.
It solves all the problems you raise (which are all legitimate) whilst eliminating the very real risks that zero-day security holes create.