Not all the towers along a transmission line are identical. Look closely at a tower where the line makes a sharp turn and you will likely find it is wider and beefier than other towers along the route. The added strength and weight are needed to resist the unbalanced pull of the conductors, which might overturn an ordinary tower. These special towers are called deviation or angle towers.
The transmission-line tower everybody knows is an Erector Set latticework of steel girders and diagonal braces. The techniques for designing and building these towers are the same ones used in constructing steel bridge trusses or crane booms. The individual pieces can be made cheaply from rolled steel and then bolted together on the site. This last point is more important than it might seem: transporting a fully assembled tower 100 feet tall is an awkward and expensive business.
Fascinatingly, one of the other big complaints people had about agile is no iteration. I don't understand how being in an agile environment makes people less iterative, but somehow that seems to be the case. And I think it's because people misunderstand and think that agile is just about putting features out faster, and not about the important part, which is getting something in front of users faster so that you can get feedback on it and make it better.
People are afraid to let design have time to actually figure out the right thing to make, because "whatever will the engineers do?" – fuck you, there's plenty for the engineers to do. Go fix some technical debt. Go fix those 700 bugs that you de-prioritized or marked as won't fix because you're an asshole.
I'm sorry, I love engineers. I don't know why I'm yelling at them. But you know, there's plenty for the engineers to do. There's all sorts of cleanup. They can work on dev-ops stuff! They can work on their build process! Make it faster! I'm not worried about keeping the engineers busy. If you think that the only thing that engineers can do is build yet another stupid feature that nobody is going to use, then you're a garbage designer and you should quit.