No problem ricardoa1! I live in "Silicon Valley" and lots of home owners here have loans above a million dollars! Its nuts, I know... The interest paid and reported on form 1098 is often over 50K. There are 7 tax brackets with the top 2 rates being 35% and 39.6%. Using 35% of 50K means saving 17.5K in taxes. These folks usually have lots of money in their company stock which is what they rely on and what drove up home prices.
And as a correction, there is one more deduction (this time the right is trying to take it away) that may get taken away. Deducting state taxes on your federal return. This one screws CA and NY the most!
You know what's better than "saving" $17.5k in taxes? Not paying $50k in interest.
Not paying off a mortgage "because of the tax write off" never, ever, ever makes sense. The math will never work.