The technology used in the accelerator and the detectors keeps changing though. Particle accelerators today are quite different to those in the 60ies. Also not

The technology used in the accelerator and the detectors keeps changing though. Particle accelerators today are quite different to those in the 60ies. Also not sure where you got the 23 billions from. Total budget for LHC is less than 8 billion euros. And that's over quite a long time frame. The whole CERN budget is only 1.1 billion a year (and they run quite a few different experiments apart from the LHC). That's within a factor of a few of a major sports club!