Tree guy said it would probably take a sustained 40+mph wind during full canopy after a week of rain to bring it down. Provided the ground isn't toast. I still feel much better about it. Lots of large, deep anchor roots. He said the holes look as if they've been there awhile since he saw some new root growth mixed in with the old.
That is good to hear ... ought to give you some peace of mind that the threat to the house from the tree is minimal at the moment.