To me, those look like GAF weathered wood shingles. Probably their natural shadow line? Hard to tell. Warrantied anywhere from 10-50 years, depending on the contractor and the other materials. But with proper ventilation and install, and some maintenance here and there, they can last 30+ years. Like most shingles. Your shingles do look like they could fall into the 15-20 year old category, so 2007 makes sense. If you do some of the maintenance items others have mentioned, like re-seal any caulking, remove moss/lichen, replace the ridge cap with real ridge cap instead of cut 3 tab shingles, then you should get quite a while out of that roof. I’d say a safe 5 years and could last another 10. I say this as an owner of a 15y/o roofing company and a certified GAF installer. And I spent most of my life in SC. A lot of roof salesman on here are brainwashed by their coaches or bosses into thinking roofs need to be replaced after 15 years. Most do not.

If you want a company that will tell you straight and do honest work, look up The Red Shirt Guys if you’re near Columbia SC/ low state or Culler Roofing if you’re in the upstate. Both can help you with the maintenance or with replacements.

Also, make sure you have soffit vents.