Thanks for the link, but dang, why the dump on P1 owners? I may not need it, but I sure enjoy using it. And since I already use it, and have been using it for 1.5 years, it's a bit ahead of Fuji's curve here, no? If I were buying in 2019, might the Fuji be a tempting alternative? It might well be, but since I am quite happy with my P1—which in my world transforms a "want" very much into a "need"—then I can continue to enjoy it very much, no matter who and what else comes along.
For me, the IQ4 has the benefit of doing double/triple duty on my P1 and my Cambo and Alpa tech cameras. And FWIW, I do find those 150mpx make a difference on 45x30, depending on what I have to do to get the print ready.
"Need" and "want" are both subjective frameworks. If the P1 price and weight are what it takes to get that stuff to market, and if as a result, it makes an easy target for a competitor like Fuji, seems to me we are all winners. And can—and should—all enjoy it.