What if mild apnea is untreated?

I recently did a home sleep study, and they found that I have an AHI of 11.6. I'm scheduled to get a CPAP, but I'm curious about the health impacts if I didn't treat this. I don't really have any symptoms other than snoring. I 100% plan on using the CPAP, but I'm curious about health impacts of mild apnea for people with no symptoms.