If you need immediate ROI (say, because you just invested a trillion dollars into datacenters) you may be out of luck.

And I don't think this is unusual. It took decades for previous technologies to be fully integrated into existing businesses. In the 80s you could see the IT revolution everywhere... except the productivity statistics, which didn't catch up until the 90s.

LLMs are still very new and have significant limitations (like prompt injection and high token costs) that are very likely solveable but will take time.