But you can already rebuild the entire world on every package change if you want (for sadomasochistic reasons? it basically makes gentoo with say KDE _unusable_

But you can already rebuild the entire world on every package change if you want (for sadomasochistic reasons? it basically makes gentoo with say KDE _unusable_); and I fail to see if there would be any practical difference on whether you statically link, you dynamically link to a hash-based soname a la nix, or you dynamically link -- you are just rebuilding everything on every library change, and you are already assuming ASLR is useless.