This was discussed in the specs of the latest version (v3), and actually Apple and other GSMA members stood in the way of this. AT&T and Verizon wanted to include lock as part of the specs but it didn't pass and they were accused of collusion: https://www.macrumors.com/2018/04/20/apple-verizon-att-switc...
So in summary, it's the opposite of a carrier lock.
This is great! I took the same approach to my glitch art: edit the file data to introduce glitches true to the image format. It's been over a decade since then and your post has me itching to get back into it so thank you!
I'm also going down that rabbit hole and I think the experience is mostly about getting out of a single mainstream cultural narrative and to increase cognitive diversity. This can be achieved by either watching movies from multiple different cultures or from completely different era. I've opted for both, and I've started writing reviews on my gopher[1] about the (mostly B&W and silent) movies I've been watching. I can clearly say, some of these are so impressive that they make contemporary movies (particularly Hollywood) look like slapstick jokes with a single plot.
Arnavion got it right, but a simpler case is that you would be able to share your webcam or video streams with multiple applications at the same time, while also allowing you to insert filters or modification of that video on the fly. Similar to how you can do that with audio servers right now.
I once wrote an article about that specific idea. For me, it's a question of scale and definition. If someone doesn't agree on the existence of a "self" they won't agree on free will either.
