Personally, I do, because it has a negligible impact in my reading records, as I DNF so few books. Since the start of 2020 I have read over 130 books, and only DNFd two of them. I read at least 1/4 of those two books, so I feel I gave them a fair chance.

If I quit a book really early, ie less than 1/4 of the book or 100 pages (whichever is shorter) then I wouldn't bother to track it.