Once, long ago...
My current machine is also not on the latest so I wonder if an attempt to brew update would nag me now...
I prefer the greater reliability of macports.
What do you mean by this? brew has been linking from /opt/homebrew for years now.
From what their site says it looks like it was done this way to keep ARM native stuff separate from old intel code which can still work under Rosetta. But I don't see any indication homebrew stopped linking system libraries as a matter of course (correct me if I'm wrong).
MacPorts makes a point of not doing this. /opt/local is its own universe and dependencies can be upgraded more or less aggressively than Apple's. https://trac.macports.org/wiki/FAQ#syslibs
Does seem like something Apple should fund / handle IMO.