I don't have instagram, but I sometimes overhear it while relatives are using it. It's a shocking experience. A series or random, wholly unrelated noises play in rapid succession, often ranging from harsh loud screams to the latest pop hit. From the outside looking in, it seems obvious that subjecting yourself to that daily would be cognitively deleterious.
If you talk about oral culture in the sense of having shorter messages, then it doesn’t necessarily have to be so much worse I think because there is a certain elegance to having clear and short messages. Like Forrest auto reviews on Youtube [1]. It’s so short that it allows more people to watch reviews for many cars. The information density is really high.
What I think is the problem is playing into emotions and especially fear. Once fear and anger kick in it’s really hard to keep thinking logically.
Recently I discovered a lecture about technical writing in academics (from my "writing to think" folder: https://www.youtube.com/watch?v=vtIzMaLkCaM) that drove this point home: If you're an academic, your default mode of writing is "writing to think", and you have to make a conscious effort to avoid this mode when you communicate.
I think it also goes the other way: If you mostly write for others (or read what they write or say in public), then you need to make a conscious switch to "writing to think", which is a different skill where you worry less about being misunderstood and more about connecting to your personal knowledge.
It's been happening with social media already, but having non-human entities take over "written thought" for many is probably going to have pretty significant consequences. I'm finding a lot of utility in LLMs, but at the same time I'm concerned about what parts of my cognitive faculties it'll cause to atrophy when overused.
Then again, maybe this is just yet another inevitable (albeit much bigger than the ones before) step on the same path we've been on since the onset of cognitive tradeoff [2] in early humans?
[1] https://www.bloomberg.com/news/newsletters/2025-02-07/we-re-...
[2] https://en.wikipedia.org/wiki/Cognitive_tradeoff_hypothesis