Re: the investment didn't make sense
Reasoning which holds up well until the catastrophe occurs and you see the bill for repairs. More often than not, you will then reevaluate your opinion of what "makes sense" as far as investments are concerned.
True story : at an important government-level organization I will not name further, there was a kerfluffle when a senior engineer warned, in writing, all the way up the hierarchy, that the currently-at-the-time PC upgrade process was an open invitation to virii and expensive downtime.
He was hauled into his managers' office for a right chewing out, which, being a senior engineer in a function from which nobody could oust him, he took with a verbal barrage of his own (likely containing many words such as "idiotic", "moronic", "abysmally stupid" etc - don't know, wasn't there, but I damn well hope so). Still, he was told that the investment "wasn't worth it" and that he should "stop making waves".
As fate would have it, the tsunami hit later that year. An outdated PC piloted by a nincompoop got infected, the infection spread to the servers, and everything was shut down for at least 3 days. That's over 500 people with no more PCs for 24 work hours. You do the math.
He did the math, and presented the cleanup bill with a scathing "I told you so" that, curiously, all the managers took quite meekly.
The PC upgrade schedule was changed after that. Unbelievable, ain't it ?