Just curious, what kind of work are you doing where agentic workflows are consistently able to make notable progress semi-autonomously in parallel? Hearing people are doing this, supposedly productively/successfully, kind of blows my mind given my near-daily in-depth LLM usage on complex codebases spanning the full stack from backend to frontend. It's rare for me to have a conversation where the LLM (usually Opus 4.6 these days) lasts 30 minutes without losing the plot. And when it does last that long, I usually become the bottleneck in terms of having to think about design/product/engineering decisions; having more agents wouldn't be helpful even if they all functioned perfectly.
This is a perfect example of why I'm not in any rush to do things agentically. Double-checking LLM-generated code is fraught enough one step at a time, but it's usually close enough that it can be course-corrected with light supervision. That calculus changes entirely when the automated version of the supervision fails catastrophically a non-trivial percent of the time.