Why doesn't rumble have video in 1080p, much less 2160p (4K)?

Many other video sharing sites/networks (competitors/offerings) support right up-to 4K, yet you are far behind in terms of live-streaming and upload resolution.

Is it a hosting issue? Is it a hosting file size issue? I know Google and other providers have it sorted out (MAXIMUM 256GB for youtube), why not you?

I already know 4K/2160P can well handle variable bit rates, and I have demonstrated that without impacting quality (most, if not all, of the videos I upload are 4K and kept within 15GB.