Subject: muni and brackets
for allocation to muni and tax-free strategies to make sense (without complex scenario-specific calculations), my impression is one needs to be (and stay) in the top 3 income brackets. (maybe top 4?)
this is to have some resilience to 'stealth' taxes which can be non-linear and are much easier to pass by congress.
some taxes of this ilk are IRMAA, investment gain tax, state-specific, etc...

in particular, if one is transitioning to retirement and\or likely to receive significant inheritance within a decade, the situation can turn quickly.

any problems with this generalization?