And it's not any better for Windows 7 people either:
In fact, Microsoft expects that Windows 7’s updates, like those for Windows 10, will get bigger.
“The rollups will start out small, but we expect that these will grow over time to something close to the convenience roll-up size,” said Nathan Mercer, a Microsoft product marketing manager, in the August announcement of the change to Windows 7’s update scheme.
The “convenience roll-up” Mercer mentioned was about 477MB in size (for the 64-bit version). Microsoft issued the roll-up in May.
In another answer, Mercer got more specific. “Eventually [the Windows 7] Monthly Roll-up will grow to around the 500MB size,” he said.
This is even more insane than the ever growing Crimson driver packages.