Yes and no. Found money is easily lost. And when a savings rate turns into a burn rate, the nest egg quickly evaporates.
Play with any retirement calculator and shift your retirement age forward even 5 years. The problem is 5 years less new saving, 5 years less returns on peak nest egg, 5 years more spending down the nest egg, (and also not collecting social security yet because too early).
For someone who didn't already have strong passions and hobbies that don't have high burn rates, filling 50 hours/week without spending down savings extra fast is hard.
You can also become alienated from those around you and the ordinary rhythms of life.
