A lot of shows and movies that were once shot here have moved to other states and more recently out of the country. England, Canada and Australia have all taken a good portion of the work we once had.

The offshoring of film and TV filming/music scoring to save $'s has been going on for decades. It started with many moving production to Canada, which provides incentives based on a certain percentage of cast or crew being Canadian (they have content laws). That was back in the 90's. Various U.S. state film commissions in the U.S. began offering financial incentives to production companies to move filming there in the aughts.

Offshoring applies to film score recording as well (the background music). Most film scoring happened in L.A. until the early 90's. Production companies discovered they could get an orchestra for 8 hours a day on the cheap in Eastern Europe ... Budapest, Prague, etc. Nowadays, it's almost entirely big budget films or TV shows (and orchestral score recording) that get shot in L.A.

Offshoring to save a buck is common in film and TV production as it is in most other industries these days.