Now I just stick with what's on the page and edit what I dislike later.
It would be handy for a digital version of that though.
It's easy: at the command line, type ed draft.txt (or whatever file name you want). Then on a line by itself, type the a command (for append). Then, just type your draft. When you are done typing, type a period . on a line by itself. Then type w to save the draft in the file. Then type q to exit ed. Your draft is in the file draft.txt. In the old days, you would then have a scroll of teletype paper with your draft on it, that you would tear off and take away to review. Nowadays, you can use another command to print the draft.
Later you can do ed draft.txt again and use other ed commands to make corrections/revisions if you like.
Or, even simpler, just use the cat command. At the command line, type cat > draft.txt. Then type your draft. When you are done, type ctrl-D. That's it. Your draft is now in the file draft.txt. You can use cat draft.txt (without the > ) to see what is in the file.
To append more text later, type cat >> draft.txt - be sure you type two >> , if you type just one > you will erase what you have written and start over.
This is the web version of the app: https://write.sonnet.io/
https://github.com/emacsmirror/draft-mode
(It was still worth it: huge fun and I learned a ton.)
We could build an editor that allows you to type but more advanced editing features like deletion would require a subscription on in-editor virtual currency. We could sell loot packs with randomly selected editing features so encourage users to buy lots of loot packs to get exactly the editing features they needed.
We could make billions! Trillions!
You can often do this pretty easily, with keyboard shortcuts or hardware buttons, and it does a lot to limit your temptation to re-read your draft while you're still writing, and makes editing (temporarily) impossible.