That, and also it avoids that thing where you have to measure every unit in relation to every other unit every move. (I had a friend who ran an Epic army with like a ~30-strong Ork mechanized  detachment that he would individually position to make sure no arty strike would ever hit more than two of them. It was maddening.)

I’ve toyed with some fixes for that, like you’re allowed to plant a ruler vertically on your unit’s base and eyeball it, which should help newbies without rewarding endless fiddling, or maybe something with templates if there are a few common move distances. That, or a Torchbearer-inspired obligation to provide and/or fetch all snacks desired during your movement phase(s). So maybe don’t take a million years.