I've recently heard some criticism of the 4% rule. It's designed with two assumptions: that you are old, and that when you die there may be basically nothing left. So it only needs to last around 30 years give or take. But if you retire at 30 with a strategy that runs out in 30 years that could be an issue.

But on the other hand I do believe you can prevent blowing up if you are willing to live lean when the economy is doing bad (the standard assumption is that you keep increasing your spending in line with inflation even as your portfolio craters).