The fact that the article raises the possibility of this limitation being removed in the near future means that it's not a law of physics, only a matter of finding a better algorithm.

Even if it were a law of physics, engineers can often circumvent laws of physics using smart caching and other tricks.

We've been waiting for this feature for decades already. It would have been better if they'd just invested a couple of more years to come up with a better parsing algorithm before standardizing a halfway implementation.