The press understands "apps" and "tabs". The press doesn't understand "filesystem snapshots". Part of the reason Apple has historically gotten much better pres

The press understands "apps" and "tabs". The press doesn't understand "filesystem snapshots". Part of the reason Apple has historically gotten much better press from WWDC than most tech companies do from their big developer events is that they laser-focused their keynote on being Press-digestible and not full of incomprehensible tech terminology that bores non-geeks to tears. As evidenced by this thread, the people "filesystem snapshots" can be marketed to didn't need it to be mentioned in the keynote to get them talking about it. Hence, using precious keynote time for it would have been a waste of marketing resources.