>But also, you continue to miss the point - this lacking/bad layout/formatting is precisely the reason not to use plain text
I don't miss the point, I rather disagree with your opinion.
Formatting and layout are properties of the client, and you can display plaintext in any color or font you wish.
But the default - plain white background and plain black text with a simple serif or sans-serif font simulating a paper document - is perfectly readable.
> rather disagree with your opinion.
So why can't you address it instead of coming up with an alternative argument again?
> Formatting and layout are properties of the client
No, I've given you a specific example - forced newlinew - of layout that is not a property of the client. ======================= is another example, this time it's formatting, also not a client property