Fascinating article, thanks! It didn't touch on why people want driverless trains. Personally, and I'm not a train engineer, but I think driverless trains would let them run trains every 15 minutes at all times of the day, not just rush hour.
The main people who want fully driverless systems are politicians who hope that no drivers == no strikes and lower salaries. Though honestly that would just move the labour power to the control room operators, even if there were a good financial case for the upgrade (which there isn't).