Just two weeks ahead of a crucial results filling, we are going to take a brief respite from mercilessly bagging on AT&T. For once, it has done something that is absolutely praiseworthy, even if it is a good few years overdue. It has announced that it will no longer sell DSL-based broadband packages, and is making the switch over to fiber completely. Yes, in the Year of our Lord 2020, one of the largest and most valuable ISPs in the world has finally ceded that it probably shouldn’t be selling copper-based internet to its customers – that it might be just about time to dig around in the executive bonuses tin, and commit to replacing those telephone lines with optical…