I still have some around, but I no longer have a cassette deck in my car. I do have one at home, but it's showing its age. According to the article "cassette sales in the U.S. rose 136 percent" - so they went from 7 to 10? Wow!
Well, I bought one last month; first one in about fifteen years, purely because CD versions of the soundtrack in question seemed to be going at silly prices. About a week after I bought it, I saw a CD version on sale at a sensible price. C'est la vie.
But yeah, I still play them on occasion: the old hi-fi system in my bedroom still has a twin cassette deck. One player was starting to squeak and graunch a bit until I found and played one of those head-cleaner tapes through it a few times. And the radio in my kitchen has a tape deck that's still going fine.
About a year ago I was trying to get rid of quite a nice tape deck, but no charity shop was interested so I took it to the dump. I still don't know why minidiscs didn't take off, I loved them & have a deck which I still use. I think the problem was that Sony overpriced them.