Her is a potential problem you haven't thought of. My guess is that you're not seeing/getting either a complete nor balanced number of cycling questions. I'm especially thinking of new reefers - taking their 'live' rock home sticking it in their tank - with xxx fish and invertebrates - since there is no way to know how much bioload one can handle with rock from a pet store, I'm sure there are lots of people who have failed, but don't report it or know they can report it. I know - when I was younger - until I figured it out - it was pretty easy to kill fish with overloaded bioload, etc.I do consider the sheer inability of any cycling umpire to provide an example of a truly failed cycle they've directly seen an aspect of updated cycling science.
Old cycling science painted the risk as high, not low, constant, many-fold, for thirty years or more.
Waiting for Lasses input. I'm sure he's seen an aquatic production pond fail at a fish hatchery, but I'm asking for simple reef tank links from a thread he worked.
If I can't find a single fail example, much less 3, from the top reefers I know, then that's amazing and we should quit painting these risks to readers that we can't produce.