Why don't we use awnings anymore (2022)

In hot areas, even the shade of rooftop solar panels can make a substantial difference inside a building. And there's the ultra low tech method of just planting more shade trees.

Unfortunately with most US build tract housing, there's not enough room between most houses to provide dedicated shade by most any method. I wonder if shade between the roof gaps between houses would be useful.

Problem with shade trees is that trees have the unfortunately tendency to loose branches or fall during severe weather and having them next to your house isn't ideal when that happens. Also, depending on where you are located, those trees may end up being a great way of letting a wildfire spread to your home.