Not quite that big, but BoB II's major raids can be really breathtaking in scale - we're still talking hundreds of aircraft. And it actually doesn't require a supercomputer to run and looks darn nice
As far as I know, big raids aren't a 'new' thing either, it's actually that most newer games (like IL-2) have regressed in terms of numbers lately. EAW for example, from what I recall, was also known to have supported massive packages.