There are many deficiencies on pc secondary storage that consoles, in particular PS5 has solved.
With PS5, essentially resource free you can take a highly compressed asset and flip it into ram uncompressed and instantly usable by the game. No system resources are used, allowing games to get on with it without consideration or management being put onto the system by loading or streaming. Free and super low latency.
On pc apart from the api layer inefficiency, all loading & decompression needs to go through the cpu. Nvme data throughput is substantial, constantly hammering the resources, not to mention the increase to latency.
There is talk about gpu’s doing the decompression, but till we see results it’s all marketspeak as a response to the consoles, and even then you are using GPU resources and likely GPU ram to load, decompress, store. PC I/o needs dedicated I/o complex in the future imho.