Not sure how it is in SF but in most of the US it's very difficult to get the permits/public approval required to build new towers. Existing towers have strict

Not sure how it is in SF but in most of the US it's very difficult to get the permits/public approval required to build new towers. Existing towers have strict load limits for weight and wind resistance and often require structural testing/upgrades for any work to be done. Verizon seems to manage so I'm not acquitting AT&T of any responsibility here but it's another example of US laws & regulations being incredibly unfriendly to infrastructure development. Of course these towers should be safe so some of these regulations are completely valid. I'm more concerned about the privately owned towers whose owners simply don't want to spend the money on new construction or the communities where a small group of civic minded folks are able to stop the construction of new towers for the sole reason that their appearance offends them. We're going to get left behind in this world if we keep this mindset up.