Nothing to connect to?
I have dual stack here and i'm seeing about 50% of traffic going out via ipv6, mostly to google, facebook and office365...
Also our VPN went ipv6-only a few years ago (inside the vpn, the endpoint you connect to is still dual stack) - this solved a lot of problems, not least of all the frequent address conflicts when users were trying to connect from networks which used the same internal ipv4 ranges.