Is this a useful pagination style for a PhD thesis?
Is it good practice to give [feedback on the reader's relative position in a manuscript by including the] sum of pages[, e.g.,] Page 13 of 200 or 13/200...? Or [is it] unnecessary, redundant, distracting or demotivating...?


Giving feedback on the relative position can be useful, but you needn't explicitly provide additional information (e.g., page 13 of 200), since this information is already implicitly known, e.g., from the physical stack of paper or from the PDF reader.

Pro-tip: Make sure the page numbers match the PDF page numbers.