It's easy to crap on tech. We — I — do it all the time.But also: Sometimes tech reminds you that tech can be awesome, in the golly-gee-can-you-believe-it sense some of us used to have about this stuff.Which is exactly how I felt after my last trip to San Francisco, when I took several rides in Waymo's robotaxis.That's partly because the tech is … amazing. You really are in a car, driving around the city, with no one in the driver's seat. Software and sensors take care of everything.And partly be...