Just read that the 2015 budget proposal includes requiring Roth distributions at age 70.5 and some changes in taxing inherited Roth's...
Should I Leave a Roth to My Heirs? - WSJ
Should I Leave a Roth to My Heirs? - WSJ
And in the general case, the whims of Washington are a good reason to remain diversified in your investment vehicles anyway, both in terms of minimizing the tax bite and in terms of managing taxable income in the future.