I was running software updates at Apple and I remember the concern and effort when the "full" update first went over a gig. We were able to get it back under a

I was running software updates at Apple and I remember the concern and effort when the "full" update first went over a gig. We were able to get it back under a gig for a release or two but it was hopeless without major new engineering work which would take time. Leadership kept yelling that there must be a way, and they didn't abate until we pointed out that Windows full updates had been over a gig for months. Of course, Apple used binary patching and compression and all that jazz... this was for the "full" version that delivered entire files.