Hehe... Macrumors forum-folk, we've all got to be a little less predictable
1) Security Updates Do Not a-Windows Make.
Relaaax -- these updates are pre-emptive. The highly skilled people who work on these underlying systems are actively bug-hunting on behalf of the entire Unix community. Every Unix system that uses these libraries (CUPS, libssl, etc) benefits from their work. Unlike Windows, we're not reliant on one monolithic entity to get around to deciding a bug's worth fixing. The people who find these bugs know their particular field intimately. Each of these updates brings more improved code.
2) OS X is Modular.
These are highly targetted updates. As a Windows network admin, I sometimes get the feeling that MS updates are like a band-aid on a axe wound. With OS X, the structure is sound -- it's served the Unix world in some form or another since the 1960's, and the NEXT world since the 80's.
3) Restarts
It'd be great if these updates didn't require a reboot. We're not there yet, but Apple have in the past confirmed that this is something they're working towards. For my consumer system, I'm quite happy to reboot for updates -- heck, it's about the only time I
do reboot. And at least we know rebootless-updates are possible, even if we've not got them now. Windows Update Services have just about managed to be able to install multiple updates without rebooting between each of them.
... and just to reiterate -- these updates do not reflect any underlying weakness in OS X. These aren't released as a mad scramble to correct some brain-damaged design decisions. They're aimed at fixing the inevitable potential or actual bugs that exists in almost every piece of code in the known world.
I still think Apple need to tidy up some rough edges. Sometimes (although this hasn't happened to me for quite a while now) an update has clobbered a customised configuration and replaced it with the default. Not sure if that's still an issue, but it's something I'm conscious of.
My Mac's been updated all the way from 10.0.3 to 10.3.3, with every update in between, without any serious bustage. It's not been reformatted once in 2 1/2 years. It's still a clean system, without cruft or flakiness.