Some might be purists indeed yes.
But most here are freeriders enjoying the hydrofoil sport, and many want it to be AS EASY AND FUN as possible
So no, it is not about performance, but about ease of riding, so unless something completely new that noone had thought about appears, the TT foils are more difficult to ride - so the assumption "Twintips are easy to learn on, thus it MUST be the same on a TT hydrofoil", is simply just wrong now, no doubt at all
Of course, many brands will aim for those (like you maybe ?) having such a firm belief that they refuse to listen and see the facts, that they might sell based solely on this.
PF