Well, that thinking will never happen, in our lifetime anyway. But it has happened on the "Camden Layout" after a long spell. My first job was to clean any debry from the track, before I can accept any trains from Campbelltown, I sent my Per way crew out to certify the track was in good condition to accept a train or two.
Finally, after following the Per way crew from Camden to Campbelltown, and one needs to be fit to do that, and it felt like an 8-mile walk, it was certified ok to run trains.
Unpacking from the boxes, was the slow part, putting them on the track took no time at all, but finding a parking spot was another problem. This started out a few years ago, to be a reduced size layout, one locomotive and some rolling stock. What I have now is 8 locomotives and a heap of rolling stock.
The layout was not completely idle during the lull, I just have a fascination for scenery. I also got involved in watching "YouTube" and films uploaded by photographers chasing "Pansy" which set my wheels in motion to do more scenery. I think I have enough on the layout now, and adding more, will make the layout appear too cluttered.