The hydraulic tensioner and water pump usually last 200K miles, assuming the antifreeze is flushed periodically.

Using time instead of mileage depends more on climate conditions. You could inspect the belt for cracks and wear, same as checking the Sbelt.

This time you should change the rollers with the belt and change the rollers on the Sbelt also.

If you look at the fine print in the Volvo maintenance guide, the timing belt needs to be changed at 60K intervals for ALL years, including the new engines, after the first belt replacement. Why, I don't know.

Time wise, anytime before 10 years, unless you live in the desert areas which will dry out the belt sooner.

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My back feels better when I sit in a Volvo seat