Comment by Fabricio20

It's funny the "handle the common case of multiple internet connections" just doesn't work at all with ipv6 yet works much better under IPv4 NAT. With IPv6 each machine gets it's own routing table due to having two addresses which means I can't failover on the router when an ISP goes down. Machine will keep trying to use the ISP that is having 100% packet loss. I can't prioritize sending traffic out of one ISP because I'd need to configure it on each machine due to them having their own routing table. With IPv4 the router can handle those rules since its doing NAT for all machines in the network so it gets to choose.