We did our research and opted for rubber mulch for several reasons.
We have to use less bug spray around the house because we no longer have rotting mulch attracting them.
It significantly reduced the concern about termites coming back.
Because the brand we bought lasts 10 years with no fading, we're not wasting time and money putting down new mulch every year. It also stays looking good year after year.
As for the concern that you're not getting the nutrients of rotting mulch, we haven't had that problem. Every year our flowers come back bigger and better than ever. The most they get is a couple of feedings with Miracle Grow each year.
I have to water less because I don't have wood mulch wicking the water up and out of the soil. The rubber also keeps the ground below nice and cool.
The only negative I've found so far is that when it's really hot outside for those first couple of years, it smells like burning rubber.