Disc went from being a blessing to being mostly a unessery step on consoles
Like If next gen games are mostly in the 100GB range & use Blu-ray XL , you get the cheap storage format but it's only used to bring the game home from the store then it's too slow to be useful once you stick it in the console & you would have to save it to the internal storage anyway & take up 100GB of your storage & the big disc drive is just taking up real estate on the console besides for backwards compatibility & watching movies (Not downplaying BC & movies)
But if they was to make a move from Blu-ray & use cards like Switch (ROM cards using the CFexpress or SD Express card casings ) games on 128GB cards would be plug & play because you wouldn't need to install the game because the cards will be fast enough to play the games from . The console would be smaller or have better hardware inside because of the room saved by not having a big Blu-ray drive. Also a console made with cards can have less RAM because you wouldn't have to load as much into RAM as you would with a disc or slower HDD because the card or NVMe can work like a big pool of slower RAM .