yeah, but it's all very well having super high tech centralised control of everything if everything can be stopped for hours on end by one thing going wrong. That's the problem with centralisation of everything, one thing going wrong can stop everything, and everyone has to wait hours while Rapid Response Squads scramble in a van from 150 miles away.* And it's exactly the same whether it's signalling or power supply. It's really not a great step forward.
* before anyone takes me literally and says "actually, they came from Peterborough, which is only 76 miles", I'm being Rhetorical
Centralisation of signalling control doesn't mean centralisation of response teams. Quite the opposite in fact.
What broke was 2 x fuses in the signalling power supply. This is just as likely to happen in a wayside signalbox controlling 5 miles of track as in a remote relay room controlling, err, 5 miles of track. With precisely the same effect.