Lexus started off with 100,000 miles, then reduced it to 60,000 miles. I can't remember where I saw it but a belt with 80,000 miles was a sorry specimen. It was half the original width and ragged. You definitely wouldn't drive anywhere with it. Basically if you have done 60,000 (6 years) and you intend to keep the car you might as well get it done now. If you intend to sell it sooner rather than later you will need to get it done.