One of my tutors at university claimed that she was able to read 9th century manuscript Cyrillic faster than modern printed books because the orthography was more varied and easier to scan/speed-read.
(That wasn't something I found to be true)
Now that you wrote it down, it does actually makes sense.
From the article:
> There was just one space width available in the typewriter, so words and sentences were separated by the same distance. The double space was used to differentiate sentences and improve the readability of the text.
I would dispute this. Sentences are separated by a period as well as a single space character, and that's not the same distance as just a single space because the period doesn't have the same visual weight as a word character. A ". " still looks 'wider' than a " ", even if it technically isn't!
I wouldn't. Typewriters don't work like computers. The additional space was objectively beneficial. I personally witnessed that.
Perhaps this is why monospaced fonts are so readable? I like having double-space between sentences.
Monospace fonts aren't considered generally more readable by people who make or work with fonts. Their particular strength is in reducing character ambiguity and preserving vertical alignment. But "readability" is subjective and depends on particulars of the specific font and of course personal expectation and preference. I find them almost always less readable than a good proportional serif font, except for code.
I do agree that monospace doesn’t make for readable prose either way.