William Hubbs wrote:
And I would argue that the maintenance cost of having separate /usr in a general sense is much higher than the benefit it provides.
That's a legitimate point (not that I necessarily agree or disagree as I'm not the one who's tried to make it work) - perhaps I should have acknowledged that it's still a trade-off. I'm just trying to get rid of the meme that whatever benefits do exist somehow don't count because they weren't planned in the original Unix design.