Yes, aside from all the functional advantages that come with a spindle, the huge reduction in noise is amazing. Any loud sound is from the tooling engaging the material rather than being combined by a screaming router motor. When I cut HDU (sign foam) or plastics the fan on the spindle is "louder" than the tooling cutting, even for heavy bites. When I'm using a small diameter tool on wood, the cutting is only slightly more noisy and normal conversation can happen near the machine. Only when a .25" or larger cutter starts taking a bite out of solid wood or sheet goods do I need to don my hearing protection. On the other hand, if I turn on the router in my router table, I better have the hearing protection on first even if the thing is just sitting there idling.
Spindles...I'm a fan!
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The most expensive tool is the one you buy "cheaply" and often...