[jwr]

> I don't think we'll see a GoA 4 tube for many years

Perhaps I'm missing something, but I used to ride a fully automatic (e.g. there was no driver, not even a cabin for one) subway line in Lyon back in 1994/1995.

[bobthepanda]

I think they're talking very specifically about the London Underground.

It's very easy to build automated trains when they're brand new, but much harder to do so on legacy lines.

[T-hawk]

Including union demands for operators to exist and get paid as part of that legacy.