Literally the most useful LLMs have been to me is dealing with the pile of corporate bullshit we have to put up with day to day.

For example, we have to plan 8 to 12 sprints in advance. Full acceptance criteria, story points, and slotted into a sprint with points balanced across the team. Of course this is utterly useless, anything past the second sprint is going to be wrong, but they want it done. LLMs got me through that in a few hours instead of a few days.