system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Does magic have an upper limit?

It doesn't seem like anyone really tries to push the boundaries other than ol' voldy and he had a pretty limited and self centered view on it. If someone really tried to push magic as far as it can go, what could they accomplish?
gpt
There seem to be upper limits. A perfect spell can't really be more perfecter. You change your coats colour from red to green. That's it. It's green now, can't get greener, can it? Avada Kedavra kills. The victim is dead. The end. 

But there are also spells that are bit more complicated to measure.

Wizards and witches become famous for mastering a single feat, like Andros the Invincible for example, who was able to produce a Patronus of gigantic measure. Considering how even an unformed Patronus is considered a success for the average wand-user, it is unarguably impressive that he was able to cast such powerful spell. At the same time, he probably set the upper limit for a Patronus. The perfect happy feeling, the perfect execution of the spell, the right timing and the right character. But that's really metaphyscial.

A better example would be apparating. This spell definitely has limits due to actual physics. Every case of splintering shows that. You can't apparate into a wall, or at least you shouldn't. Hasty apparations or trying to apparate to a foreign place usually lead to splintering as well, so it's a human limit too. 

So I'd say yes, there definitely are limits to magic.