I've been in pager rotations for most of the last 20 years so I'm sympathetic to that. If some genius symlinked unzip to 7z with no testing in production and caused an incident I'd be real mad. But uh I don't think that's remotely what OP was suggesting here.
"if no critical service depends on it, just update and see"
It did not sound like OP was running a hospital infrastructure. And I never did either, nor intend to. I try to have a linux that does what I want on my computer. 7z was helpful to me, so I shared it, that's it.
But I get your point...
"I made plenty of good comments, but this one thread counts as flame war and he has to go by the worst, not by the best comments"
I thought about replying with some Don Hopkins comments, that were way worse than what was here and he is clearly not restricted. But I didn't, as I don't do Kindergarten, I just took a time off from HN.
But it definitely is not equal standards.
So I respect Don Hopkins for his knowledge and experience, but not his style of communication sometimes.