Frankly the best solution i have seen is always a combination of things. At least in the city I live in, people can take bikes on buses and trains, many people walk, and for trips that require trunk space (e.g furniture, DIY supplies etc) there is a Car sharing service that is cheaper than owning a car, or using ride share / taxi.

I don’t think waymo is a better option than a combination of what’s above, I think it can perhaps compliment it but it should not be the sole last-kilometre solution.