It pretty much is at this stage, though. You can turn on native v6 on a LAN of "normal" workstations running modern operating systems, let them pick up an address through RA and not even notice that suddenly you're connecting over v6 to Google et al. Anecdotally I've been running native v6 on my home and work LANs for years and the number of failures as a result of IPv6 is vastly outweighed by things like technicians cutting the wrong wires.

Turn off IPv4 and see how far you get.