The one point I can see as being a factory issue is the lack or supply of the raw materials needed in production; copper, zinc, brass, lead, etc. Those are items that must be allocated first before increased production can be had but to my knowledge many of the resources are plentiful & sustainable. These items have been around for 100s of years. Product demand or a huge increase in new shooters shouldn't drive these industries out.
As discussed, the overall demand for many common calibers; .22LR, .38spl, 9x19mm, .40S&W, .45acp, .223, .308(7.62mm), 7.62x39mm, etc might wind down but I doubt the sale prices will lower too.
The major ammunition firms will space it out so local gun shops & retailers can keep the prices higher.
