Doesn't that decrease security? NAT plays a big role in anonymising users and providing some basic security. If every device has their own ipv6 address, scannin

Doesn't that decrease security? NAT plays a big role in anonymising users and providing some basic security. If every device has their own ipv6 address, scanning devices for vulnerabilities will be much easier. Having secure devices is obviously the better solution but will never happen. That 10 year old vending machine won't get an update anytime soon and hiding it from the outer world could be the best way to prevent it being part of a botnet.