>Except that instruments don't come with a backspace. If you want a closer approximation simply refuse to edit your texts at all: write it out in one go and refuse to fix any mistake that you make.

The other day someone posted a webapp they wrote that doesn't let you edit and that blurs all the text except the current line while you're typing. If you want to edit your text, you need to download the file. His aim was to separate writing from editing, which I think it's an interesting approach.