PB has value for people who only want to block trackers and not non-tracking ads. Believe it or not, some people like supporting sites through ads. They just don't like being tracked.
Personally I use uBlock and Privacy Badger. I'm not sure if it's entirely redundant, but I have not had any bad experiences with using both.
"supporting sites through ads" is like supporting your local grocery store through buying bottled water there.
Blocking ads and using reusable water bottles are socially responsible, positive behaviors. Anyone encouraging ads or encouraging bottled water (or worst: encouraging bottled water ads) should be ashamed of the harm they're doing to the world.
Personally I use uBlock and Privacy Badger. I'm not sure if it's entirely redundant, but I have not had any bad experiences with using both.