Such a bummer. I scored a deal on a maxed out 2017. It is plenty powerful for many many tasks. Xcode, web development, screen sharing my iMac Pro, and of course all the other necessary tasks, mail, music, browsing, etc. Haven't seen a hiccup yet, and I am running Catalina.
Instead of discontinuing it, they could have offered a 2019 model with the same specs, just with the latest generation butterfly keyboard. Another article published today says the new Airs and Pros are getting the latest keyboards. This MacBook was the product that introduced the damn keyboard. It's a shame it doesn't get to see the latest and greatest before it's demise.
Either way, I love the portability and silence of this machine. 2 pounds!? So light and small I can hardly tell it's there. Sorry, but the MacBook Air weighs 38% more, that is not at all insignificant. I do wish it had two Thunderbolt ports like the new Airs. That is my only gripe about the device. Hoping for a future comeback.
My guess is that they couldn’t get even 1 TB3 port to fit within the thermal specifications of the case design. The next generation of the Y chip (Ice Lake) goes from 5W to 9W since it incorporates TB3. The 2019 MacBook Air has a 7W version of the chip that’s in the 2017 12” MacBook, plus it has a fan and a TB3 controller, so it can more easily accommodate the Ice Lake chip.