I found this link to the DXpeditions Honor Roll interesting:http://www.yt1ad.info/3d2r/dxpds.html
It seems like many of the "super rare" have been activated in recent history and these were BIG operations. This suggests to me that they will be activated again, perhaps not now but in the next 5-20 years. There are FIFTEEN on this list that I still need, that is quite alot of "rare" DX that will require little more than me remaining alive to work them.
Maybe the biggest challenge with be the "remaining alive" part.