Yeah, but the situation you responded to would also not benefit from pck file unloading. It wouldn’t benefit from splitting into multiple pck in the first place, with or without pck file unloading, as you yourself have already pointed out.
Valid cases for pck file unloading:
- Swapping physical media while the game is running.
- Unloading mods while the game is running.
Valid cases for pck file splitting that do not require unloading:
- Installing the game on a FAT-32 USB stick.
- Separating out optional parts of the game for faster downloads.
- Separately downloaded DLCs.
- Getting past file size limits for web games.
Not a valid use for pck file unloading, and also not a valid use for splitting pck files in the first place:
- Some misguided idea that multiple smaller pck files are somehow faster than one big one.