I don't think Chee Tor was dismissed lightly, the Copenhagen Fields team are very good friends with the Chee Tor team and there have been occasions where the two have been exhibited in the same venue. Having helped move Chee Tor, it was very heavy, due to the weight of the carved plaster scenery. I believe it didn't really have the crating and portability that Copenhagen Fields has been forced to adopt. Maybe that took its toll on the enthusiasm and motivation to exhibit? I believe it now has a permanent home in Canada. Both Chee Tor and Chiltern Green & Luton Hoo reached a point where further development gave diminishing returns. I feel this is a characteristic of, for want of a better term, countryside layouts.
Even now, after nearly 40 years, Copenhagen Fields can still absorb just about any detail that's worthwhile incorporating. Earlier this year, I made a couple of vehicles (pre-war Reliant and Austin 7 vans) which are admittedly both tiny. On the layout, they will become quite insignificant little items. Before that, I produced some advertising hoardings which seemed quite large on the workbench but simply became part of the overall scene.
Perhaps this is why the layout has been able to sustain the team's interest for such a long time.