I was thinking (from reading the headline) that if one specific component fails 15 times during boot or so, it will just automatically get disabled by the system, so that you don’t run into an unavoidable boot loop.
But this makes sense as well, if they did write “up to” in the article (as others have stated). Even though I find the confidence weird. Imagine you have some weird dial-up or satellite internet solution for your system, which just needs time to connect, and then maybe also just provide a few bytes/kilobytes per second. This must be rare, but I’m 100% confident that there exists a system like this :D
Edit: okay, I should read first. The 15 times thing is said for azure machines.