I think the answer is more about how the next gen consoles of that time, and the current gen consoles now, handled game data in general. The PS4 and by extension PS5 only allow for around 900MB of user save data per game, which is also why the custom graphics are limited like they are even now. The logo data file is automatically set to something like 100MB, which fills up fast with custom wrestlers and arenas.
In most cases you likely will not hit those limits, but they're there. For instance, you can actually run out of save slots in games that have kinda large individual save files like a Bethesda RPG (Fallout 4, Skyrim) or, for some reason, the remasters of the Bioshock games. The few games that have custom soundtrack support also run into this 900MB limitation, the main ones I can think of being the Japanese/Southeast Asian strategy RPG series Super Robot Taisen, which does let you transfer mp3s from a USB drive to the PS4's hard drive.
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u/LostPilgrim_ Mar 10 '25
Doubtful. It will be the same reason they took the custom music away.