I suspect a lot of people commenting in this thread have never been on one of these ships or have any idea of what the typical state of maintenance is, and how inaccessible the tech compartments are when the vessel is underway. This isn't exactly a server room environment. When vessels are new (in the first five years or so) and under the first owners they are usually tip-top. Then, after the first sale the rot sets in and unless there is a major overhaul you will see a lot of issues like these, usually they do not have such terrible consequences. They tend to last for 25 years or so (barring mishaps) and by then the number of repairs will be in the 100's and the vessel has changed hands a couple of times.

Passenger carrying vessels are better, but even there you can come across some pretty weird stuff.

https://eu.usatoday.com/story/travel/cruises/2025/08/27/msc-...

And that one was only three years old, go figure.