[notzorbo3]

Because NATting encapsulates while routing doesn't? And encapsulation is the whole idea behind containers. Until everything is ready for IPv6 (lol, yeah right), NATting seems the only way to me.

[lima]

You can encapsulate just fine with a routed architecture.

You still need NAT to talk to the outside world (your services are behind a load balancer either way).

[geggam]

Why do you need NAT ?