All,
I wrote the five-year rule article that appeared in the Humble Dollar referenced by the OP.
As a recent retiree, I was keen to understand the pros and cons of Roth conversions. I spent a fair amount of time researching them and then wrote myself a 10-page paper which I named, Roth Conversion Guide. This project helped me figure out what I wanted to do with conversions. I also gave my guide to several of my retired friends and family members who found it useful.
Given their positive reaction, I submitted it to Jonathan Clements at the Humble Dollar. While Jonathan liked it, it was too long for the articles he publishes on his site. He asked if I would turn two sections of it into two shorter articles. So I did. Besides the 5-year rule article, I also wrote an article called, To Roth or Not (link below). (BTW, he's a very nice guy.)
https://humbledollar.com/2020/05/to-roth-or-not/
I would be glad to share my full guide with anyone who would like a copy. I don't understand the mechanics of how to do that, but I suspect someone here could tell me how.
Rick
A few PSs:
I am not a salesman. I'm just a former financial weenie with an interest in Roth conversions and too much time on my hands. Also, I taught myself a lot about this subject, but I do not purport to be an expert.
Finally, my guide makes no recommendations as to what anyone should or shouldn't do. Its goal is to provide information to let readers come to their own conclusions.