Several reasons include, high memory usage (resulting in tabs to frequently crash), malware in some extensions / add-ons, certain software bugs that can result in data loss, providing updates that are not in the user's interest, but Google's interest and so on and so forth. The fact that
@TL1096r brought this notice to us a good thing. Google should have prompted users immediately. The auto-updates again should clearly inform users on-screen (shouldn't have to notice an update in progress when going into settings). Again, cannot rely on the cloud. Many people use Google's ecosystem to the fullest and though Google chrome ties in nicely with the rest of Google's cloud computing products, they should allow the integration of other ecosystems as well as a fail-safe.
