Earlier quoted context omitted.
I would argue in the current situation of 3.5% mortgage rate, the best scenario is to invest the cash in the stock market. If your returns are anything above 3.5% over the 30 year load amount, you're good.
I read this counter-point a lot. Its never clear to me how you invest the mortgage payment and also pay rent to live somewhere. Am I missing something? Sincere question.
You invest your excess money in the stock market (hopefully returning more than 3.5%) instead of paying off your mortgage early.