My CPA has been bugging me to do it for a few years but I don't really care that much and it looks like the backdoor conversion option is going away anyway.
That's too bad. That's $66,000, more depending on your age, you could have put into a Roth IRA since 2010.
Invested in a total US stock market or S&P 500 index fund, with compounding interest that could have been a fortune with tax-free growth and tax-free withdrawals, no RMDs, and no age limit.
A Roth IRA is the most valuable retirement account one can have, with an invested HSA account a close second.