A "brain drain" doesn't just mean that people actually quit and leave. They can also dramatically ramp down the intensity because they are suddenly in a very co

A "brain drain" doesn't just mean that people actually quit and leave. They can also dramatically ramp down the intensity because they are suddenly in a very comfortable financial position and the big risk they have been working so hard to avoid (losing their valuable equity for whatever reason) is off the table. It sucks, but that's the way it is for many people. It's hard to keep up the super high level of intensity after so long, especially when the downside case is mitigated by newfound financial independence.