The model car I have launched in 2008 and was phased out in 2017. I bought the 2017 model because that model got rave reviews the entire time it was out, so I figured it was a safe bet for a long-term car.
That said, even though the model launched in 2008, there are exactly 0 compatible after-market stereos according to Crutchfield, even after close a decade of production. So it's not a matter of it being brand new.
This isn't unique. It's not exactly an exotic car, and it's not unusual.
Every year, there are fewer and fewer cars with standardized double-DIN infotainment systems, and there are more and more cars with integrated and non-replaceable infotainment systems. Toyota's low-end models might not have this yet, but they surely will soon. If technology flows down from their Lexus brand, where the stereos are not replaceable, then it's only a matter of time.
I get what you mean about people being more worried about the entertainment system than the car themselves, but I don't think this is true. The OP article doesn't say they care more about entertainment than the car itself. It just says they care a lot about the infotainment system being compatible with their smartphones. And also, cars have evolved to the point where comparing traditional car characteristics don't matter. Pretty much any car you buy in 2017 will be fast, reliable, efficient, safe, and good. You're only choices are: size, price, and interior amenities; pick two.