While not anything blockchain-based, I had a similar thought of just doing social media through a single text file that you can add to/remove from whenever, and re-post the whole thing[0]. Literally HTTP POST it.
Edit, amend, add, delete, schedule, etc., all from a single text file. I haven't worked on it in a few weeks but I intend to get back to it soon.
I'm pretty sure, OP is aware of that. Someone found a passion project for themselves. Nothing to be snarky about, right?
People do stuff for the sake of doing stuff all the time.
Haven't been posting as much as I want to yet, I'm working on the editor from https://markwhen.com to hopefully port it over to https://post.mw as well
Edit, amend, add, delete, schedule, etc., all from a single text file. I haven't worked on it in a few weeks but I intend to get back to it soon.
[0] https://post.mw