Disclaimer- ex Meta employee.
Horizon was horribly managed, but also we threw all of our unannounced projects under that umbrella to make it look better for shareholders when we finally cut it. The original LLM research, smart glasses, and a bunch of other projects were under the "Reality Labs" business expense.
what amount, if we agree some nice research came out of these labs, we can attribute to Zuck directly impacting the process in a positive way...?
I'm trying to counter my thesis here really, but let's allow myself to be wrong about a person.