Worth adding that “cash” doing nothing is less true than it was. A T-bill ladder at current short rates is not a painful place to park two years of spending.
Learned this one expensively. Converted to what I thought was the exact threshold in October, then a fund threw off a distribution in December and I crossed it by under $400. Cost the full surcharge for a year.
Mid-forties, accumulating, mostly index funds. Came from the asset location article — had never thought about which account holds what. Would read more on coordinating that across a household with two 401(k)s and a taxable account.