No offence gWaPito, but what are you suggesting?
Put any spare cash into a savings account at 0.5% and keep paying interest on the mortage? or pay off the Mortgage?
In these days, those people who can reduce their debts are doing just that rather than tucking away their dosh for almost no gain, and with nearly 5% inflation that won't go away any time soon.
It's not about renting.