No, I can't simply do math.
First of all, only 3 in 10 households even itemize, period. That eliminates virtually all but the upper middle class and the upper class seeing any real benefit from SALT.
Then per the article above,
"The Joint Committee on Taxation calculates that for those earning more than $200,000, the SALT deduction cuts their federal tax bill by an average $6,295."
, a blended rate of 35% is not unreasonable to assume. So $6,295 tax savings / .35% rate = $18,000 in extra itemized deduction being stand TODAY. $6,350 * 2 = $12,700 increase in standard deduction covers more than 2/3 even for married couples over $200k (which is top 5% of households).
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As I already said, yopu are either full of $hit, or made of it.
Property taxes and state and yes,in some places,city taxes, for many, far exceeds whatever the benefit of doubling of a personal deduction will be.
Most mortgages these days are more than $1,000/mo. $12K/yr meets or beats the std deduction without charity or state/local tax write offs. Maybe people are too stupid to itemize?