Thanks for the input.
I purchased the link belt for my band saw and there was a substantial reduction in the vibration. One of the primary reasons was the belts had been stretched between the pulleys for a number of years without use. A mentioned, this causes an “out of round” or memory effect that added to the vibration. For machines that get frequent use, the use of good quality v belts may be sufficient.
I believe the pluses of the link belt, i.e., longevity, flexibility, ease of length change, reduced vibration, and no memory effect, justifies their cost on some machines. With the 25% discount at HF, the belt was reasonable at $20.