I have yet to encounter the tech problem they can solve. LLMs really suck at troubleshooting, they love to go on esoteric tangents that are unlikely to succeed and then get hung up there.

You must be superhumanly bad at using this class of tool. They work pretty well for troubleshooting, and can be told to share their sources. This has allowed me to fix all sorts of issues I wouldn't have been able to without 50+ minutes of searching.