You'd be surprised some of the places it's used. If you use a credit card, odds are it was authorized via an Assembler-based online. If you get cable TV, high-speed internet, or telephony services, there's a good chance your bill comes from an Assembler-based system. Many insurance companies still use it and a number of banks.
To those who would rather drive a sports car than a Cadillac, Assembler is still a very useful language. Our company estimates we need 25-40 percent less CPU to process the same volume compared to a COBOL/CICS online. More transaction-intensive platforms would benefit even more.