Perfect example: this morning a number of people reported that they lost the ability to control their devices from the mobile app (both android and iOS). Support was aware of the issue and it appears it was resolved in about half an hour.
Some people are reporting that they had to physically reboot their hub to bring things back online once the platform issue was resolved. There is an option to reboot remotely from the cloud account, but it appears that was not working until the reboot was completed. So people who were away from home could not do the reboot.
Was this a major outage? Yes, in the sense that many accounts were affected. No, in the sense that they were only affected for a short time and quite a few people may have slept through it. And more major for some of us than others, since some of us cannot physically do a reboot on the hub.
So different people will be affected to different degrees. But there will be some people, because of the features that they use, who had similar issues on three different days this week. 