Wow, really interesting!! When I first read the chart, I interpreted "crash" as a tank crash, i.e., total loss of the ecosystem and a need to start over. We've had a few cases of "butt burn," etc. on the forums but to your point, not a major concern from my own casual observation. Of course it also depends on the type and species; i.e. a bimac and a cuttlefish are going to behave very differently... I think tank owners (and the industry at large) tend to get species that are less likely to wreak havoc in a tank, which is why nobody keeps squid, for example.
Yes, I am not too happy with survey questions so perhaps we could do it again as a few years have passed so survey fatigue will be low. We could do a much better job and split questions in cephalopod type.
We don't spam - but yes Reef Central is awesome! We have coexisted symbiotically for as long as I can remember. We get some referrals now and then.
that is great news as if we do another survey we might be able to get responses from this forum to if you have a good relationship with them?