Terrible news. TT made one of the bravest and most consequential decisions in the history of professional sports when he moved on from Favre to hand the reigns over to Rodgers. Idiots out there were practically calling for him to be burned in effigy after he made that call, and he had the stones to stick with it despite the enormous pressure placed on him by Favre, the media, and a huge percentage of the fanbase.
His call - and the other decisions he made - led to a Super Bowl and another decade of excellence. He faded towards the end - citing that autonomic disorder (and he lost some talent in his front office as well) - and it's fair to be critical of those last few years. But when he was at his peak, I'm not sure if there was a better GM in football.