Without warning, Apple has stopped selling the Mac Studio with its previous maximum configuration of 512GB RAM, perhaps because of worldwide shortages.
The current Mac Studio
The current Mac Studio
One day ago, you could have spent $14,099 on a maxed-out Mac Studio. That included $4,000 on a 512GB RAM option, but that is now gone.
At the same time, Apple has raised prices on what RAM upgrades it still offers. The configurations depend on which processor you select, but for one example, it now costs an extra $400 than it did to upgrade from 96GB RAM to 256GB RAM.