Kakashi Hatake's limit with the Eight Gates is one of those classic Naruto debates that never gets old. From what we've seen in the series, he's only shown opening the first gate, the Gate of Opening, during his fight against Zabuza. But here's the thing—Kakashi's a genius with insane chakra control and endurance. He could probably push further if he absolutely had to, but his fighting style revolves around precision and efficiency, not brute force like Might Guy. I'd bet he could handle up to the fifth or sixth gate in a life-or-death situation, but he'd be wrecked afterward. The man's smart enough to avoid that kind of self-destructive power unless there's no other option.
That said, it's fun to imagine Kakashi going full Eight Gates like Guy did against Madara. The visual of him surrounded by that red aura, muscles straining—it'd be epic, but totally out of character. He's more about calculated risks than all-or-nothing gambits. Plus, with his Sharingan drain and already low stamina, pushing beyond the first gate seems like a recipe for disaster. Still, the idea lingers in fan discussions like a what-if scenario we all wish we could see animated.