Even if we take purely engineering, support and operations functions, there is still plenty of “human glue” in the organizations that allow for them to function - the larger the org, the more often you need to interface people between each other, and corner cases become more complex.
Big Tech which is the most vocal about their technological savviness is a great example: pretty much nothing has changed on business and cross-functional side since the 90th and earlier, all key decisions are made via Powerpoint, memos and personal contacts. Jeff’s innovation of preparing and reading a one page of problem statement and proposal at the beginning of a meeting was considered breakthrough in this field. No LLM in sight that can magically fix this [semi-ironically] beautiful mess.
And don’t get me started on B2B Sales and Partnerships.