LA County is big on the Quints. Especially since they can take an Engine and relocate it for brush fires, or use it for a brush fire strike team(5 Engines and a BC). This leaves a double house(Engine and Quint) with a piece of equipment that can be put to work as an engine. LA County only has a few light forces, and they are counted as Truck Companies. They also have a couple of stand alone Quints, and they act as either or depending on where they are assigned on an incident.
CITY tried out one of the quints a number of years ago, IIRC, and they weren't sold on it. They like the light force concept of an engine and truck staffed by 6 guys, and counted as a truck company. CITY got away from Snorkels in either the late 70's or 80's. County went to the towers in the 80's.
It's a totally different way of life out there. They don't have the structures like New York does, in the sense of 6 brick MD's or 22 story projects. They also get a lot of life out of their rigs. Usually twice what NYC gets. Usually 15-20 years front line service, then 10 or more as a spare/reserve. I was out there about 5 years ago and saw a 1977 Crown Firecoach being used as a spare, and a 1974 Crown being used as a frontline piece for the Call Firefighters(Volunteers) attached to a station out in the boonies.