one of my favorite streamers who calls himself "Demolition_D" was streaming this game and he plays the game on the standard PS4 (not slim or the Pro). I was there to witness his despair when the game fails on him.
So first time he was at the forest and he cleared out the whole area as well as doing a side quest. He did not quick save yet. Then later, we see a weird graphical glitch where some assets were flickering. Then after that, a faded bar shows up and says something along the lines of "map loading" and it was pretty much stuck there. Music is still playing and the loading icon is still moving, but it was stuck there. So he had to reset it and the chat went wild since we thought it was hilarious.
Second time he was at the city ruins and he saw a floating building. Being a Nier/Drakengard fanboy he is, he does his best to just ignore it and try to avoid the viewers from taking notice, even though it was right there! Next thing you know, crashed! He was so drunk that he forgot to save for 2 and a half hours!
I realised that these game crashes are so foreshadowed. Because a weird graphic or asset glitch comes in first, then after that it comes the crash.
I'm playing this game on my PS4 Pro. Never got a weird graphical glitch. Frames do drop and it still has the stuttering issue. The worst I got was textures failed to load in quick enough even though I'm near it, but that was it. 36 hours in and still no crash, yet it happens to Demolition_D on his standard PS4.