Why is SNS healthier than acrylic?

I'm curious to understand, why is SNS considered healthier than acrylic for dental veneers? Are there specific health benefits associated with SNS that acrylic lacks? Are there any potential risks or drawbacks to using acrylic that make SNS a more favorable choice for patients? Additionally, how does the durability and longevity of SNS compare to acrylic? Can you elaborate on the factors that contribute to SNS being perceived as a healthier option?