Twtich server upgrade so also more bitrate upload and users pay a small pocket money for this :)

You know it from server hosters "You want more upload or more storage, then rent at Twitch-Turbo the server package" For +5,90$ or 9,90$ you can upload and stream up to 13K/ 15K.
So Twitch would have less problems with the costs and who does not want to pay such a server upgrade remains with Free and 6-8K upload depending on Twitch contract.

Possible would be this Year, because it's time for an Upgrade at Twitch :)
YT has long been at Good (Hype) Quality and Twitchazon ;) would be well positioned with Amazon AWS Servers and their Data Centers.

I wish you a nice Day and come well into the New Year, Love Twitch :D