No, it's not "sort of like asking why they don't make 8-Tracks anymore", not even close. That's a poor analogy. There is almost zero interest in 8-tracks and no one is producing any players or accessories for them. And I'm not at all suggesting that vinyl is "the best thing out there". I'm just pondering my favorite audio company doesn't have a TT in their line up when everyone else does, even though they are still dedicated to 2-channel audio more them most of them.
Every other major audio company has at least one TT in their line up and are coming out with new and better models all the time, Sony, Onkyo, Marantz, Denon, Teac, NAD, etc. I've heard that Pioneer bought out Technics and came out with a clone of the Technics SL-1200mk2 a while back, but Yamaha doesn't have anything. I guess all these other companies haven't yet figured out that "technology has moved on". Quite the contrary, they are jumping on the vinyl bandwagon like never before since the late 1980's.
Yamaha still sells a separate tuner, and I imagine buyers of traditional AM/FM tuners are far fewer then those buyers of TT's. They also produce a myriad of 2-channel integrated and stereo receivers (with phono inputs) to the point of confusion, but no TT. It seems odd that Yamaha remains so dedicated to traditional 2-channel audio, yet they still have no TT in their line up.