Sony appears to have patched it from firmware 4.06 and up. The adieu in the title appears to refer to bidding a farewell to the exploit rather than a codename for it ;-)
qwertyoruiopz[1] claims to have achieved kernel-level code execution on 5.00. It's probably not going to be released to the public anytime soon, but it's still not over for the PS4 homebrew scene.
In fairness, it started back when Sony shipped their first piece of hardware with technical measures to prevent users from consuming the media of their choice :)
Naw, the homebrew/piracy groups have been around since the birth of the console industry. It’s been an ongoing cat and mouse game for over 30 years at least.
Great and insightful write-up nonetheless!