re: Using a Roth 401K to minimize RMDs - Good idea?

We are in our early 40s and our guy is advising the same thing. When he first mentioned it, I thought he was crazy, but the model has us thinking it’s the right thing to start doing. I was a difference of about 3 million in taxes paid over the model to age 90.

I switched this year to Roth 401k contributions from traditional, and will start converting our traditional 401k over the next decade or so at the top of each bracket.

Couple things we are considering to pay taxes now:

Already mentioned potential loss of spouse and impact on tax brackets
Tax free (with no 10 year RMD) for heirs
Lower bracket for Medicare and health insurance