Comment by ThatPlayer

Not just loading times, but I expect more games do more aggressive dynamic asset streaming. Hopefully we'll get less 'squeeze through this gap in the wall while we hide the loading of the next area of the map' in games.

Technically the PS4 supported 2.5" SATA or USB SSDs, but yeah PS5 is first gen that requires SSDs, and you cannot run PS5 games off USB anymore.