> All of them sucked.
I have a Mazda 3 skyactiv which is not a luxury car. The infotainment system is rather very solid. It's very responsive. I almost never had a problem with Bluetooth and I never needed to use the touch screen because the buttons UX is good enough.
Comparing to the other crap I've seen in the same category cars, I'd say the Japanese pulled a hell of a job.