I think it depends on the manufacturer, I believe today there are better factory systems than in the 80's. My friend has a Mazda and the system is weak, I would have gotten rid of it immediately while another friend has some type of Chrysler wagon that has one of the best factory systems I've ever heard, the same for a 2012 Durango, the tweeters are incredible, smooth and clear, the bass sounds tight and powerful. Kia uses Infinity systems with subs. Lincoln used to have good sounding JBL systems. You are seeing more features like USB ports and such. For the most part I think manufacturers tend to offer a decent system and most have some type of upgrade audio package.