After you've done about 50 or so major classics, selected broadly from different thinkers and authors, it is clear the vast majority of most books have negligible additional value. This can all be done quickly in your late teens to early twenties, after that, there is no real need to read more than a book or two in a year, and even then, it is not usually worth reading those one or two in entirety.
Digital textual sources like the ones you mention have far more continued and sustained value at this point.