I live in Virginia so humidity is a thing. I tried the "put it away dirty" thing for a test ONCE. Never again. Punched the barrel after a few months with a dry patch and it came out orange. Was it the steel, maybe. Rifle was a Remington 5R 300WM. Still shot fine.
Depending on the cartridge, most get cleaned at about 20-40 rounds. I try to pay attention to the throat as well to help keep it happy. I will leave them dirty for a week or so if I know I am doing load development or will shoot again soon, but not for extended periods of time.
Once I develop a load for a hunting rifle, I map the cold/clean bore and the cold/dirty bore. I will figure out where the rifle likes to shoot with one shot and a follow up. Some can be squeaky clean and have one holers, others need a few down the tube. I try to keep it to where I know it was when I mapped the cold bores. Most go afield with about 10 or so cold bore shots on them but not much more.
I watched some videos where they don't clean for quite a few rounds, but the guy is in Texas and probably shoots a few times a week. If going in the safe for a bit, mine go away clean... Hunting will be fouled but not excessively.