Your cheeky response, posed from a lack of knowledge viewpoint is understandable. I can’t answer about AMD. I told you what Nvidia does, and used another industry that operates the same way as an example.
Your question and response doesn’t change the fact that if you find a 2018 model year car on a lot after the 2019 releases, it is a leftover. Every car sold, at least here in the USA, has the car’s manufacture date readily available, so you can verify when that 2018 car was made.
As to Nvidia, let me give you this. April 15, 2016 980Ti, 980, and 970 production ends.
https://linustechtips.com/main/topi...s-to-be-replaced-with-pascal-chips-this-june/
The 1080 was then actually announced on May 6, 2016 with a release on May 27, 2016.
https://en.m.wikipedia.org/wiki/GeForce_10_series
And the Kepler to Maxwell transition, again indicating that Kepler discontinued when Maxwell announced, and whatever is available is what is already in retail pipeline.
https://www.gamespot.com/articles/nvidia-releases-549-gtx-980-beats-780-ti-in-benchm/1100-6422422/
What the OP of this news piece left out was the Reason that 1080Ti is in short supply. “Multiple sources” conveyed that production ended some time ago. Based on the last two cycles, that is not hard to believe at all.
https://www.forbes.com/sites/jasone...-longer-in-production-supply-running-low/amp/