It's not the cameras alone. It's everything combined. ROADS, micromanaging, etc. Now, it's my understanding in January (after PEAK thankfully), new power-pads are coming out that will give you turn by turn to your next stop and there's no way around it. You're going to have a computer tell a courier who's been on their route for 5/10/15 years how to run it? We have a running joke 'If you want extra hours, follow DRA'. I have LOTS of questions about how this will work with on-calls, customer requesting reattempts, road closures, dead-ends etc.
I understand the front facing cameras, but some might find an interior facing camera invasive. If I wanted someone 'looking over my shoulder', I'd be a CSA.