MvV> Presently there are no true IPv6 only nodes. All IPv6 capable nodes MvV> still have outgoing IPv4 capability and that will probably remain so MvV> for a long time. So the added value of IPv6 incoming only is marginal MvV> as long as you still have incoming IPv4 capability. With incoming IPv4 MvV> capability one is still reachable by all.
MvV> As it is, outgoing IPv6 is more usefull. You need that to connect to MvV> nodes that no longer have IPv4 incoming capability. Those will come...
The setup of my network makes it more likely that I could become temporarily IPv6 only (incoming and outgoing), because my BBS IPv4 addresses come via an OpenVPN tunnel, while IPv6 is native. So IPv6 outgoing only can be useful for getting in contact with me if things break. Same for incoming only, because I would lost all IPv6 connectivity in this situation.