Today I can wipe the entire drive on my MacBook and re-install everything from scratch over the internet, without install media, directly from the firmware. When can I buy an off-the-shelf computer that can do this with Linux ?
After installing macOS I set up my account, enter my iCloud details and all my photo's just appear, I can send and receive text messages, phone and video calls. My clipboard syncs to my phone, and I use my phone to take a photo or scan a document and insert it directly into whatever document I was typing. I can start typing an e-mail on my phone, decide it's too long to type on the little on-screen keyboard and seamlessly move the task to my desktop. I can take a photo of some text on my phone, copy it as plain text, and then paste the text into anything on my desktop.
All of this with no setup required.
How much time will it take Linux to be able to do all of this ? And what else will it have to catch up to by then ?
You're right that "Good Enough" takes many forms, and it is a moving target. But whether it's closing the gap might just be a difference in which timescale one uses.