Zoners are like cats
they come and they go according to their own schedules, and I know better than to try and own a cat or a Zoner.
With cats as with Zoners, you can only express how glad you are to see them when they show up, pet them and fuss over them. And know that someday they won't show up, and you'll never really know their fate.
That makes each checkin precious. It means a lot to me to know you still draw breath, Dan!