Its enough of a boom for a small company like fujifilm to justify producing more cameras and lenses and even start up and grow a medium format mirrorless ecosystem. Fujifilm in particular struggles to keep up with demand which is probably not easy given global shortages, but it goes to show there is a market. It's not the market it was in 1995 or 2005, but its a market no less because there's always a demand for the best image technolgy can do.

Phone cameras will always look worse than their contemporary full size counterparts just due to physics, so the pros and prosumers will always be in demand of a dedicated rig even if their iphone looks like a spider on the back. Not to mention even today just from an OS standpoint, no phone has feature parity with even the first dslr released since phone manufacturers "childproof" camera features that pro camera manufacturers assume you don't need your hand held to use. Usually you have to resort to a third party app if you want to set a manual exposure, you know, something any photographer since 1860 could do that we now deem to be "too advanced" for modern humans.