Mortgage markets have been so flush with cash that home buyers are able to layer one risk on top of the other. It's possible to borrow more than the value of the home, put in no money of your own and pay a minimum monthly payment.
This would free up cash now, while still minimizing their exposure to rising rates during the period they expect to remain in the house.
If you re-extend from 15 years back out to 30 years, that might reduce your monthly payment by 30 percent, ... If there isn't a likelihood that you'll pay off your mortgage, the re-extension of the term of your loan could measurably improve your cash flow.
This is very popular right now because it lets you draw some money out of your home and improve cash flow. If you do this, resist the temptation to draw too much equity out of your home.