Absolutely. Writing textbooks is extremely time consuming... Seeing 'Mathematics - May 2019' in the list of tracks for Primer strikes me as un-serious. Likewis

Absolutely. Writing textbooks is extremely time consuming... Seeing 'Mathematics - May 2019' in the list of tracks for Primer strikes me as un-serious. Likewise the single animation for Hyperbolic geometry in the 'non-euclidean geometry' page on mathigon.