thinking positively- perhaps they have gotten the support they needed, the answers to questions or the "been there, done that, try this" guidance that helped them get to the point that they are happily living their life and felt they could 'move on'?

In oher words, perhaps it is a good & healty thing they don't feel the need to regularly be on the board.

I will blissfully choose to think this may be agood development (but I do miss them)