The only real permissions systems I’m familiar with are the basic octal permissions in *NIX and NTFS permissions. I know those aren’t really quite the same but they’re the closest I have actual experience with to be able to have an opinion about.
At one point I also knew a little iptables but that was over fifteen years ago now.
As said, I really should spend some time with them, I just need the motivation.
ACLs are literally what makes up NTFS permissions, too, they just aren’t as clear about it