My interests are so widely ranging, I have to strategically choose which topics I am actually going to invest time reading a book about.Scholarly takes on philosophy have too much influence on me, so I try my best to understand the philosopher myself. The problem is the old traditional German science style of writing makes it a difficult read.
I got a lot more from reading the Republic, after I read and listened to some Plato scholars disuss the Republic.
To this day, I have never read a single original scientific paper Einstein or Bohr published on general relativity and quantum mechanics, but I have a basic working knowlege of them from textbooks, lectures, periodicals.