One ring to rule them all?
After the FCC is built, no doubt they will want something even bigger. In astronomy, we have a related syndrome called "aperture fever" (and a tendency to run out of superlatives when thinking of names: what do we do after the Extremely Large Telescope? Outrageously Large Telescope? Obscenely Large Telescope? Humongous Telescope?). I wonder what they call it in particle physics? Circular fever?