Comment by kijin

Larger slices taste better, too. Kimchi starts to lose its crispness as soon as it is cut. If you store pre-cut kimchi in the fridge, it will turn into a floppy mess much sooner.

So you're more likely to be served uncut kimchi in restaurants where the menu requires fresh crisp kimchi, as in bossam, kalguksu, and seolleongtang.