We live in SoCal. Just closed on a house in CO.
Decided to take the tandem to CO with all the hills and keep singles here to ride on rolling coastal routes. That seems like a totally backwards was to do it, esp since I just swapped out disc brakes for rim brakes, but my wife and I both thought the same thing.

Part of it is that https://www.gardenofgods.com/ is one lot from out new place and the roads are perfectly smooth. Just there are not enough of them.