Japanese Cherries can be much more packed with flowers than this pear (It depends on the cultivar). Both Cherries and Dogwoods are royalty on gardens, but both deploy to much wider structures that can be low branched and tend to hang searching the floor, so this Pyrus is still pretty much unbeatable for narrow streets. Palms have their own problems, like thorns, but are "designed" for streets with extremely windy areas. The problem is that palms don't survive the same frost than pears can.

There are maybe five or ten trees so narrow in their category that, unlike conifers, bring blossoms, clean relatively dry fruits, and excellent fall colour in snowy areas. Some are among the most alien things that you can have in a garden.

And all that grows in such acute angles is prone to catastrophic cracks for wind damage. It comes in the package.

Having a Dogwood that would grow fastigiate retaining the "dog wood" part, would be a revolution, but is not available at this moment (and probably will never be). Dogwoods love the 90 degrees angle. I have a maple 'Tsukasa Silhouette' that would look great, but is too small, too expensive and too delicate to be used as that.

Pears are still one of the tastier fruits in a garden, not ornamental royalty, but food royalty for sure. I just ignore the short interval of smell as a necessary tax to pay.