The number is around 32 for boomers, and 34 for millennials.
The age range is very specific, say 95th percentile onwards, else you can just say 18 - 39, but you would find that even more unreasonable, despite it including roughly the same population.
It's not wide. Mortgage payoff is not tracked as much as anyone would like.
> A modest increase in income or net worth is meaningless if housing has skyrocketed in comparison.
If the housing prices are temporarily inflated or stagnate for a few years, then it truly does not matter as much as you would like it to be. No generation is immune to market conditions, nor should be.