Considering the past episodes (Air Canada, SwissAir FedEx, ValuJet), ALL smoke in the cabin/cockpit should be treated as a potentially catastrophic event. In some cases, there has been less than 10 minutes from initial sensing to the end.
1 out of 3. But you have three fatal incidents listed!
Again, in as many days, and with all due respect. Another instance where we can see a wide reaction to an incident from experienced pilots. I understand all too well keeping a schedule and meeting FAA times, but 145 passengers is a lot of lives to gamble on.
As always, be safe