Vista seems to have more than one update a day as of late, maybe they are giving us 7 a little at a time.
I'm with most folks when it comes to don't fix it if it's not broke.
My wifes XP had it for two years and nothing has gone wrong even though it does not have SP3 in it. Course I does not go on line at all.
Two vista laptops, nothing goes wrong, only time they have been on line is for Hoster neither has had updates lately.