Someone's CV in .docx would be readable at least and, most of the time with intact formatting (especially if the author didn't use spaces as indentation), even if opened in some {libre,star,open}office or whatever, heck, on modern Windows you can open .docx in Wordpad, ie you don't even need MS Office on Windows to open .docx.
But I don't even know what is the Pages[0] format, extension, what apps can open it on Windows.[1]
[0] like really, I never in my life needed this.
[1] yes, you just can open it in 7z, but the similar can be done with .docx too.
I don't mean to be dis-charitable to your comments but it sounds like you're saying that people should use the currently bigger walled garden over the currently smaller walled garden?
But I don't even know what is the Pages[0] format, extension, what apps can open it on Windows.[1]
[0] like really, I never in my life needed this.
[1] yes, you just can open it in 7z, but the similar can be done with .docx too.