The whole idea for (I'm assuming our generation) was "Save for retirement now, because you will be in a lower tax bracket in retirement - here's your 401k".
For my wife and I that idea went to hell (in a good way). Out Gross Income goes down by about 23%. However our disposable income is going to go UP by about 40%. (We've been making large 401K depositions for a number of years, once we both retire those deposits stop meaning more spendable cash for what we take in.)
So I've been toying around with what I call "Bracket Withdrawals" from the 401K. If you are in the middle of a tax bracket, you can withdraw more without change brackets to a higher rate. Now if you near the next bracket you may not do yourself any favors.
Since there isn't really an advantage to keeping the money in a 401K, I'd like to move it out. If I pass before my wife she gets everything anyway. If we both pass, then it get's trickey for the kids as a lump sum distribution will be a killer on taxes for them. They can reclassify it as an "Inherited IRA" but there is still a 10 year limit to empty it.
If we can move most out of the IRA, to similar non-IRA investments, we pay taxes on the dividends, but the account balance can transfer as part of the estate with no taxes to the kids.
Very complicated to me as I'm not a money guy. So I wouldn't take any steps without talking to a CFP/Tax person.
WW