Imagine a server that keeps crashing every other day. For most webhosts’ this isn’t something too hard to imagine. Every host would have gone through this phase, where they are clueless as to why their server keeps going down.
Most of the time, the blame falls on faulty hardware. Usually this is true, circumstantial evidence proving that no recent changes were made to the software, and hence the source of issue would most likely be hardware. This doesn’t always have to be correct, as there are other things that could go wrong.