Even disk-based games on newer consoles often don’t include the full game
That's pretty rare despite being constantly mentioned in this thread. I can think of a few that are strictly multiplayer games or the Master Chief Collection which is just a huge net installer disc.
Otherwise games still become gold and are playable start to finish off disc. Switch games on the other hand have quite a few that require a download.
Its incredibly niave to think it costs Sony, co-developer of blu-ray, 10$ to press a game onto a blu-ray disc. Its probably costs a dollar or less to manufacturer a disc by bow. They can sell blurray movies for $9.99 and still profit.
It will definitely be cheaper for Sony to stick with optical discs next gen if they don't drop the drive entirely.