I mean, I guess... Apple is always early when it comes to killing stuff. But as late as 2016 you could still buy a new MacBook Pro with a DVD drive.
This was done with a replacement on hand which was more functional, more reliable, and easier to use. BT is not any of these things.
AirPods are more functional, just as reliable, and are just as easy to use.
Admittedly, far more expensive. But wired headphones come with iPhones
More functional than and just as reliable as what? There are thousands and thousands of headphone models with the standard plug, many of which are arguably much more functional and reliable.