Where I ride it's very dry, and I ride lots of dry, dusty fireroads and singletrack. Mud is a fairly rare phenomenon here!
Ever since I started using dry lube (currently Muc-Off) I'm pleasantly surprised how little (like, usually none) gunk builds up. When I was using "whatever" lube (must have been wet lube-not sure as I was more of a noob then) I would most certainly need to get in there with a brush, etc after most rides. Now I just wipe the chain off, and apply a little more dry lube after a ride, or, if the bike has gotten fairly dusty I'll quickly hose it down, let dry, and lube the chain. Maybe every 3-4 mos I'll use some orange degreaser and get in there with a brush but it's usually not even really necessary.