39 % is not 50%,
depending how close you are to retirement and what tax bracket you are in a back door roth doesn't always make sense
This is from "Physician on Fire" website
The Verdict: Are Backdoor Roth Conversions Worth the Trouble?
The initial benefit of the Backdoor Roth, as compared to putting the same $6,000 in a taxable account, is worth maybe $20 to $50 per year, per person, and that money will compound over time. You also virtually guarantee you’ll never pay taxes on the withdrawals, which may or may not be true of the funds in a taxable account.
If you have no IRA money in your name and are comfortable accepting the minor disadvantages of the Roth account for $6,000 of your annual investments, I think it
is worth the trouble. It takes a few minutes each of two different days, and perhaps some time to research it to make sure you get it right.
There’s also form 8606, and I’ve linked to several examples of how to do this on paper or with online tax preparing software
here.
However, I would not go to great lengths to clear a path for the backdoor Roth just to save yourself maybe $28 a year. You could do financial harm if you roll over rollover money from an IRA into a 401(k) with even slightly higher fees than the IRA in which it currently resides.
There’s no reason to beat yourself up if you haven’t been contributing to a Roth IRA via the “backdoor.” It could save you a little money now and possibly some capital gains taxes later on, but I consider the true benefit to be marginal for most of us.