During my early LEO years in the 70's, I carried a BUG most of the time on patrol. That was usually a Model 60. Then, as a narcotics detective, I might carry as many as three. Our standard carry was a Walther PPK or PPK/S while U/C. For search warrant or arrest warrant service, as well as non-U/C activities, we also carried our 1911's. Later, when we began to carry semi-autos for uniformed use, I still kept that Model 60 as a BUG.
In the early 90's, I changed departments to my home town PD. We were prohibited from carrying BUGs (although many did anyway). I got out of the habit, and it became more normal not to as I rose in rank.
Today, being retired, I find I usually carry a j-frame around town with at least two speed loaders. If I'm going to be traveling out of the town, be on the road or in a less than desirable neighborhood, I'll carry a Shield, G26 or G19 with several spare magazines and (maybe) a 340 M&P. This has become more of a matter of habit, as opposed to conscious thought. A BUG is never a bad idea.