BP> ipv6 only nodes cannot connect to you, i solved this yesterday
Presently there are no true IPv6 only nodes. All IPv6 capable nodes still have outgoing IPv4 capability and that will probably remain so for a long time. So the added value of IPv6 incoming only is marginal as long as you still have incoming IPv4 capability. With incoming IPv4 capability one is still reachable by all.
As it is, outgoing IPv6 is more usefull. You need that to connect to nodes that no longer have IPv4 incoming capability. Those will come...