I'm glad Riot defined void creatures in such a way that Kog'Maw isn't a continuity error

>Some legends suggest that, when they first emerge into the Runeterran air, the Voidborn are generally pale, fibrous and flexible.

Exactly how Kog'Maw's body is.

>With no organic or magical sustenance nearby, the Void’s material growth will slow, until it eventually falls into a dormant state.

Kog'Maw's hunger is still consistent with Void lore.

>As they age, sections of their form harden into a darker, shell-like chitin, which can become strong enough to turn aside almost any weapon.

We see this in Cho'Gath and Vel'Koz.

I know it's no surprise that Kog'Maw represents a young (maybe larval?) form of a void creature, but I'm just glad there is consistency without having to overhaul creatures who have been long known to be voidborn.