Witcher 3 has a completion rate of ~21.6%. Cyberpunk 2077 has a completion rate of ~23.6%.
They knew completion rate was a big issue in Witcher 3 so they designed Cyberpunk 2077 with that in mind supposedly. But I think theyre hard metrics to get a full grasp of simply because you have to separate between someone that just hated the game once they started playing it, and someone that liked the game but ultimately lost steam just because of how much content, monotonous or not, there is in the games.
The clothes, the depth of the original character creation system, and a lot of the "dead code" in the game solidifies the idea that the developers original intention with CP2077 was a GaaS. They definitely had feature creep and it bit them on the ass. But if they actually would have released what they originally designed the game for - CP2077 would have been top dog.
No amount of DLC will get a majority of its players back. They need to drop this game like a bad habit and move on to the next Witcher before the company completely shuts down.