I’m sorry, what’s the question? Genuinely not sure.
I’ll rephrase, Zuckerberg would certainly enjoy agentic coding to be a wild success because it means less staff and more products he could fail to create.
Again, Zuck's success criteria don't necessarily align with that of others. In fact, I'd expect his success criteria are substantially different to most.
Consider: Someone who "expects" their bank account to have $100M in it before they turn 30 and "only" gets it to $10M.
From the point of view of a normal sane person, they are experiencing "wild success", and yet at the same time they are definitely "going slower than [they] expected".