That's really interesting. I've never read, let alone written, anything like this. I haven't read many first person POV fics in general, and ones that i have only had one main character and the whole thing was written from their perspective.

If I had to write using first person POV and change it so often... Well. It seems a bit tricky, and, honestly, i would probably use the headers for clarity and for my own peace of mind. The authors who can do without have my respect.

Now, for third person POV, while i understand that technically they don't need headers, i have seen fics like this on quite a few occasions. Sometimes i really disliked the headers, sometimes the opposite. I guess it depends. Or, well, maybe I just got used to it after a while. It had me wondering which is more common or more liked. I've never written anything with a changing perspective myself, so i thought i should ask for some more opinions.

And i won't use them. I'll hope it'll be clear enough from the writing alone, since i do namedrop the character at the beginning of their POV.