There are definately less opporunities for flight engineers now then there have been in the past, and the number is also definately decreasing. But, it is nowhere near being nonexistant. There are an enormus amount of classic 747s, DC-10s, DC-8s, 727s, etc being flown around the world. Even so in the United States, mostly just 727s as far as passenger airlines go. But, these aircraft will be with cargo airlines and airlines in less developed countries for years and years to come.