Hmm regarding quality i get mixed signals from this and other comments. To be honest i don't say you're wrong about that risk being real but it's clear reading the other person's comments on quality being actually poor with assets that there is some assessment in both quality and usage that I don't fully understand. The placeholder use is indeed based on my reading of studios own accounts, but if you say it is problematic, I can't argue that as I have no other experience here and tbh if a game is fun I'd take the dog with no head and cubes too.

I would say the quality is usually too poor to ship, but good enough that it can slip through unnoticed.

It's like a web developer using their own photo as a placeholder for the CEO on an "About Us" page: seems like a fun little in-joke, until it accidentally ships and you get an angry phone call from your boss's boss. It's better to do the boring thing and play it save by using a big red cross with "REPLACE ME" on it so you'll definitely catch it during the final review.