Caltrain canceling San Francisco weekend service until 2019 (sf.curbed.com)

Oof, that sucks for many people, but depending on where you were going maybe takinhtg bart to millbrae and transferring would work? Of course then you have an expensive Bart trip to go with your expensive Caltrain ticker...

Can somebody who follows the electrification project explain why diesel is bad but electric is so good that they have to upgrade?

We're talking billions of dollars for less than 50 miles along an existing railroad right-of-way. I don't get it.