When I started in LE in the late 60's about the only thing carried concealed was a model 36 or, sometimes, the Detective Special.
You could put the Smith in a pocket, and, if you had a Bodyguard airweight, as I did at one time, you knew it wouldn't snag.
Got a really neat shrouded Agent in the mid-to-late 70's...it was really "carryable", fairly concealable and was a "six-shooter".
Two good friends were involved in off-duty shootings in those days...separate incidents, but both armed with Chief's Specials.
One took four rounds to down a speed freak, but the other did so with one round. neither felt under-gunned.
In hot weather, truth is, you can usually always find some place to pack a "J" frame. Then, you've at least got something there. And, well, a guy knows that little wheelgun is gonna work, if he needs it.
Nobody wants to fight with a handgun ( I hope ) when a suitable long gun is available, but, the small 38 is ALWAYS there, at least for me. I still pack one off duty and, sometimes under certain conditions, even on-duty.