Shortages or not, there's little demand for cool new motherboards and CPUs from the enthusiast corner of the market because hardware platforms themselves are stagnating performance-wise.
13-14gen Intel Cores are still more than enough for your average home gamer, Zen 5 shows only marginal improvement over Zen 4 except for a very narrow range of workloads, getting wider than 128bit memory bus is prohibitively expensive while relatively cheap consumer boxes like Mac Mini run circles around dual-channel DDR5 setups, so on, so forth.
Sure, presenting this as a consequence of AI boom is convenient for a news outlet, but even before the craze both Intel and AMD were dragging their feet.
I'm not buying it. Both the premise and the new motherboard, that is.