You seem to be implying this thread is unkind to the team. Given most of the experience here, probably many are intellectually attracted by the architectural problem of scaling a product like ChatGPT, while examining how a company with almost unlimited funding approaches hiring.

Statements like these: "The presentation also specifically mentioned that using ORM can easily lead to inefficient queries and should be used cautiously."

Shows they are not experienced enough, to run this type of infrastructure at scale.

How does that statement convey inexperience? The presentation doesn't try to present that as a novel conclusion, it's just a true statement.