If I remember correctly, the 2016 challengers had alternator iissues. I remember seeing just about every year of challenger on a dealers used car lot and they always had low mileage.
I had two challengers a 2012 and a 2021 no issues what so ever, good solid cars.
Traded the 2012 in for a 2017 Ram 3500, and the 2021 traded for a 2023 Wrangler, 4x4's fit my need better.