I think we can extend that to just about any sim or modular type of game. DCS, ArmA, obviously Star Citizen. FSX from what I am told feels similar due to needing various 3rd party modules which are all developed at difference paces. Perhaps IL-2 BoS is the exception to this rule in modern sims? Far from ideal but sadly I think it has become expected for anything slightly related to this genre.
In addition to what Paradaz said, I think you're confusing RELEASED games that are then patched/tweaked/fine tuned with ED's perpetual-beta status.
