This is cool but like Ratchet and Clank Rift Apart the limitation doesn't come from the data or the decompression but from the CPU part because when you load part of an open world or a level in a linear game you need to setup NPC and ennemies in this part and other stuff are done on the CPU, this is the bottleneck in R&C Rift Apart and this is the bottleneck in Forspoken.
I'd wager pretty much every game that's running on an NVMe based system is limited by CPU speed rather than IO throughput. That's why Direct storage is going to be so important on PC, because it should help alleviate some of those additional steps the PC has to deal with vs consoles at load time.