Disaster looms
The rails and the wheels meet as 2 metal surfaces. As they heat up, eventually, the two surfaces could bind together. So you have a delay for 90 minutes, or wait until they become unusable and then the line is out of action for a couple of days / weeks, whilst they replace them both. So make the choice - which would you rather have?
(That's assuming of course that it doesn't cause an accident, kill 60-80 people, in which case it might be closed for a bit longer. )
Yes I know that a lot of people were late home - poor things. But at least you do have access to a public transport system. Where I live, there are 2 buses a day - one up in the morning, one down in the afternoon. It's five miles (yes miles) to the next bus stop.
Now of course, that doesn't excuse TfL; they should be better organised. But people get very complacent - far too many are happy to complain when things don't quite right, but they complain even loader when they go horribly wrong. And the loudest complaints come from those that wouldn't know the first thing about a trackway.
(From an ex-member of a volunteer Permanent Way gang, 1995-2001. Respects to Foggy, David H, Julie, the Padre and the rest of the crew. See you all in the chapel of the blessed Lethbridge again one day)