Marble Arch refurbishment (old posters)

You know preservation can be a wonderful thing but the question is where to draw the line. Preservation in situ restricts progress and is detrimental in many ways to efficiency of operation and usage where something that really could do with being replaced cannot be. I think nowadays a majority of LU stations have listed building status and that can be a nightmare as far as installing new systems goes. On the other hand it is pleasing to keep facades and finishes where it is possible to incorporate them into a modernisation scheme.
There is plenty of LU preserved in situ but covered up to be rediscovered at some future time by another generation though over time such areas get forgotten except by the few who know them and eventually many of them disappear years after they vanished from site. Places such as Euston and Liverpool Street spring to mind where relatively recent developments removed what had lay hidden for decades.
Ideally it might be better to preserve the finishes and other artefacts of many stations at some kind of working museum with perhaps even a short section of line. Personally I always delighted in seeing what was hidden from the travelling public as I explored most of the disused stations during my career.