Every last one of his children, friends and grandchildren has visited him by now. Including my little brother. The last to visit him was my uncle, his youngest son, who flew home early from vacation. Grandpa actually managed to open his eyes a little to look at him. Uncle said "It's OK, dad. You don't have to fight anymore. Let go and rest."
It's all up to grandpa now how long he still wants to hold on. The food tube was not placed, there were too many risks of infection.
Mom's been put on 40 mg of Prednison, 8 times her old dosage. Still, she's glad and relieved she finally knows what's wrong with her. She's going to bring her doctor flowers and a bottle of good wine.