I don't see motherboards shortage so we are fineEnthusiasts do need to worry about mature nodes: that's what a lot of support components like platform micro-controllers are still being made on. You can't make a GPU or motherboard without system monitoring, fan control, PWM controllers, audio, LAN and a bunch of other chips that don't require bleeding-edge process. Same goes for keyboards, mice, USB hubs, monitors and countless other peripherals.
There are everywhere mobos in range 70-1000USD, everything in stock, where is your shortage? If there were any shortage or problem with manifacturing, you wouldnt see $70 mobos, stupid wi fi and other useless stuffs are not worth $300, this is only greed.You can only be greedy when the supply is at least somewhat constrained, otherwise you end up with unsold stock as a liability.
AMD hasn't launched a new chipset in nearly a year. Most people who wanted an A520/B550/X570 motherboard already got one, so availability and pricing of old stock has more to do with not letting inventory rot in warehouses than current chip shortages.There are everywhere mobos in range 70-1000USD, everything in stock, where is your shortage?