Hose life....

Seen this on a Duramax forum, would like a "second opinion". Went something to the effect of because todays coolant doesn't contain silicates (?) As long as the coolant is changed at recommended intervals hose life is indefinite. Any truth to it? Replaced all the hoses on my Duramax 8 years ago, upper radiator hose was getting stiff so I am replacing them all...