Kudos for sure. Quite extraordinary.

I known a fair few people who do things like this. With poetry or 'open mic' type raps. They got note pads with certain subjects at the front. Then add on whenever something comes to mind. hour by hour. Day by day. week by week. It does seem to go well over a thousand bars too.

They saw it as their way of exercising their writing abilities. And going back to it for ideas or whatever. It's an extreme. And you it's not suitable for all (no matter how talented you are, cos you may not be able to do it too well, but still be as talented a writer as someone who can).