Currently trying to source a large amount of DDR4 to upgrade a 3 year old fleet of servers at a very unfortunate time.

It's very difficult to source in quantity, and is going up in price more or less daily at this point. Vendor quotes are good for hours, not days when you can find it.

At some point that’s true, but don’t they run the n-1 or 2 generation production lines for years after the next generation launches? There’s a significant capital investment there and my understanding is that the cost goes down significantly over the lifetime as they dial in the process so even though the price is lower it’s still profitable.

Undoubtably the cost would go up, but nobody is building out datacenters full of DDR4, either, so I don't figure it would go up nearly as much as DDR5 is right now.