If you watch 'Naruto' fights closely, Sage Mode looks like a cheat code, but it actually has some neat, annoying limits that keep battles interesting.
First, the whole trick depends on drawing natural energy. Early on that meant Naruto had to sit perfectly still to gather it, or risk turning into a useless stone statue if he absorbed too much without balancing it with his own chakra. He learns to gather while moving, but there's still an environmental dependence: places rich in natural energy (like Mount Myoboku) make it easy, concrete cities or sealed arenas make it harder. That alone can force him into unfavorable terrain.
Beyond that, Sage Mode increases perception and physical power, but it doesn't make him invulnerable. Chakra-absorbing or sealing techniques, massive area attacks that overwhelm his reserves, and opponents who counter sensory abilities can blunt the advantage. Against foes who outpace senjutsu's endurance or who remove natural energy from the equation, Naruto needs backups—Kurama, clones, or smart tactics. Personally, I love how those limits force him to mix brains with brawn; it makes victories feel earned.