The missing link in the article is that "tax law" changes almost constantly. When I was in my 40's (now 69) there were 5 PAIR of states, adjacent to each other, where one state had no sales tax, and the adjacent state had no income tax. Today...there's only one set of states left like that.
Before we moved to the southeast for retirement, I looked long and hard at TX. The problem with TX is that their property taxes are absurd. And they have almost doubled in the last 10 years or so. And as we all know, property taxes never go down over time. If we were to "transplant" our house in IN to the Austin area, which is where we wanted to live, the property taxes would be $20,000 per year.
One of the posters above is correct. It's not just the state you live in, but the locale. County and city taxes can take alot of money from your disposable income. 1.5% on $100k is $1500 a year of addt'l taxes. Not sure about you guys, but I can put that $1500 to work a helluva lot better than the city/county gov't.
Taxes are an important factor in retirement, but so is quality of life, weather, medical access, entertainment, etc etc etc.