The Lake series of amphibious airplane came long before Searey, but they never been very popular here compared to regular high wing float-plane, because of two major issue, the first is docking this low wing flying boat and the second one is that the Lake cannot be operated on skis, just like high wing planes, wich makes it a 5 months-per-year-useable-plane (here in the freezing cold Canada).
Searey must be really cool in places like florida, bahamas, or the keys, you can land, beaches the plane and take a sun bath.
Fred