Personally if I wanted needlessly repeating unmaintainable hallucinated code in my projects while also frying my neurons and turning my brain into mush I'd eat some shrooms, visit my own little 3072 dimensional embedding space, and do it myself - which would also save me from having to sell a kidney to cover the hallucination token costs. I suppose that means I'm not the target audience for your question?
Joking aside, the only practical use I see for it is rapid prototyping, GUI mockups, documentation/example search engine, stuff like that. As long as it doesn't touch production code. And even in that case I'd use Qwen3.6 over paying for the garbage tiers of frontier model providers where you can't even be sure which specific models prompts are routed to, or in the case of Claude accidentally triggering it into "thinking" you're training a model on its output, causing it to intentionally output wrong or misleading data (have fun trying to debug that one if/when it happens!). I suppose security audits is an area where it can actually be useful (if you manually validate its findings and do the patching yourself), but that involves sending Scam Altman & co all your data/code which given the nature of these companies and their CEOs seems like a pretty bad idea.
TL;DR: don't rely on AI too much, run local inference where possible, don't vibe code production code.