I understand that the overwhelming majority of people will still continue streaming at 16:9, or the vertical equivalent. It’s not just about ownership of ultrawide displays. It’s about support for such output format, for people who do want it. But even going by your own example, a ton of phones are 19.5:9, with some models straight up being 21:9
We’re getting vertical streams before 21:9 aspect ratio support. Come on
Ultrawide is extremely niche compare to vertical resolutions/aspect ratio. It’s not even close.
Ah, yes

Vertical Video Syndrome
We were warned, but allowed it to become endemic.
“Youtube will begin showing 4 videos at once”
The average YouTube short:

Edit: It’s called “Sludge content”: https://en.wikipedia.org/wiki/Sludge_content
Which reminds me of a certain part from Back to the future too. I’ll try to search for it, but my DVD drive is currently occupied
Edit 2:

Part 2 at 30:27 (at least on PAL edition)
I mean across all display devices, not just monitors.
Dont get me wrong, while I don’t have an ultrawide, I’ve seen some of them in store and they look wonderful. It’s almost like being in the future.
That being said, it’s clear that vertical resolutions/aspect ratios are far more widespread.
I understand that the overwhelming majority of people will still continue streaming at 16:9, or the vertical equivalent. It’s not just about ownership of ultrawide displays. It’s about support for such output format, for people who do want it. But even going by your own example, a ton of phones are 19.5:9, with some models straight up being 21:9
Getting vertical video before modern codecs (AV1∨HEVC), and the same bitrate limitations since it was justin.tv.
It’s impressive how stagnant Twitch is, and how expensive it’s purported to be.