PlayStation 5 discs should have made multi-disc games obsolete. Using Ultra HD Blu-rays, which can store up to 100GB when triple layered, PS5 discs can hold twice as much data as PlayStation 4's Discs. This means that a PS5 game could have twice the texture data and be twice as big as a PS4 game and still use only a single disc.
Yet, for some reason, Final Fantasy 7 Rebirth is using two discs. But, that's not all. Square Enix nearly needed three discs for the upcoming sequel.
As pointed out by @ILovecloti on X, an interview with the members of the FF7 Rebirth at the Taipei Game Show in Taiwan has reaffirmed Square Enix's ambitious content plans for the game. Motomu Toriyama confirmed that the production team had to work hard to fit the game's content onto two discs.
This isn't the first time Square Enix has hyped how much larger Rebirth is compared to Remake. It's safe to say that it's confident the game will deliver.
FF7 Rebirth will retell the latter half of Disc 1 of the original Final Fantasy 7 game. It will presumably end the same way as the first did: with Aerith dying at the hands of Sephiroth (or sword, rather).

