There certainly are genres of photography where you absolutely have to take a picture of a fleeting moment in under two seconds, but I don't think it is a commo

There certainly are genres of photography where you absolutely have to take a picture of a fleeting moment in under two seconds, but I don't think it is a common scenario for most people. The things people photograph the most are people (incl. themselves), and landscapes/objects/things. And I say this as someone who recently dumped $6.5k on a camera for wildlife. I obviously do see the advantages of dedicated cameras, but for casual users I don't think they'd need more than a phone camera. $.02