I stopped letting my iPhone update. I swear every update makes it slower and buggier. My old iPad which was perfectly fast and great at the time is now almost unusable after 4 iOS upgrades. It won't even play Sudoko without constant mini freezes.
Also they know when and why to update stuff they work on, thus i never happens at an inopportune time. Nor do they find themselves having to wrangle the new dependency kudzu they created, because for them it built up over time.