That street's sin is not the lack of trees, but having 6 entire lanes for cars, which apparently all go in one direction. An uncrossable nightmare that only even has stores at one side!

Those nice trees take a few decades to grow, need serious pruning, will cause foundation problems next door, and increase building setbacks anyway. We also waste two entire lanes for street parking, have basically no businesses on either side anyway, and the street is still too wide. It might be urban, but it's still a car centric hellscape, just with some shade.

Yes but not on roofs. They're so heavy.

Aren't grass-like plants working reasonably well? It's quite common on new build where I am