Goldman Sachs issues a report about generative AI; currently too expensive to justify ROI, no killer app and looming power & chip shortages.
That said they see money to be made if a killer app is found and also simply because bubbles take a long time to burst.
You can read the entire 31 page report below https://www.goldmansachs.com/intelligence/pages/gs-research/gen-ai-too-much-spend-too-little-benefit/report.pdf