I’ve lived through all the Apple migrations and all the DOS/Windows migrations and not only is this among the most feature-rich releases, it is actually running right now on my Mac (and iPhone) after an in-place upgrade. I seriously sat there watching the install process thinking “this is going to take like a day to finish and it will probably fail and roll back in the middle or something”. After about 30 minutes the whole thing was complete. The amount of amazing engineering that went into both the creation and deployment of APFS is mind-blowing. And that it was done on phones, watches, and PCs is nothing short of spectacular and except for maybe the transition from FAT to FAT32, I can’t recall anything even close to this. There are a ton of features under the covers that will surface in use of Apple devices, but mostly it will just make everything better seamlessly.
High praise from the former president of the Windows division