One place where I genuinely believe LLMs could be beneficial is correcting spellign mistakes. I just don't think the interface is there yet. I want to keep control over my writing. After feeding it through an LLM, it doesn't sound like me anymore and changes random stuff. Rather, i'd like something like a diff viewer that shows you your sentence and the LLM's corrected sentence right next to each other. You can review each suggestion individually and decide whether to incorporate it yourself.