Talked with a friend/industry colleague a while ago and she was also on a company-paid rental car...but it was Avis or Budget...anyway the car was a 2016 and had like 25k+ miles and the interior definitely looked fairly dirty/worn compared to national cars. Certainly you have to appreciate national cars and in general they are better than many other rental car companies.

(Location dependent of course. I once had a Jeep Wrangler rental out of ITO that had about 40k miles on it....lol)