In my experience, pure black-and-white text does extremely badly.
If someone is in a position where they have to read through 100 resumes, there is a limit to how often they can look at a paragraph-formatted WYSIWYG text edited black and white document that says "I did well at school, I worked some jobs afterwards, now I want to work here". They blend together something shocking.
It is worth having a tasteful dash of colour or maybe a formatted header/footer where possible. Low bar, but there is a big pool of serially unable-to-get-past-screening candidates who can't clear it and you want to stand out from them if at all possible.
I'm allergic to resumes that recite every single technology the candidate has ever used, leaving little said about what they accomplished using said technologies.
That's true and that's how I tried to have my resume but I've had quite a few recruiters saying something like "I cannot see a list of technologies you know". Which has been the opposite of what I've been told in the past, where impact and goals are more important.