When Boogie boards came out the Paipo almost disappeared. The surfboard has evolved from boat designs and is really a scaled down, redesigned, and much improved version of the outrigger canoe and the Boogie board the same. Of course there have been many improvements in shapes and materials, Surfboards are designed for the rider to paddle around on and float around on, much like a small boat. The same with Boogie boards, a main factor is its ability to float, like all good boats. If it don't sink, it's good.
People feel safe when it don t sink.
Surfing the waves was very much like the old canoes did. Of course it's been around for many years now and a lot of things have changed, but not the basic boat origins. My opinion is that surfboards and boogie boards are improvements on an old theme, not a design synthesized, after thought and observation. The paipo is just that. Previously the comfort of the rider was not even considered.