Jack's various essays from the 1950's are still readable, though somewhat dated, as, to a greater extent, are those by Neville Braybrooke and Christopher Hollis from the same decade.
Can anyone explain/simplify in plain English on the bolded line in the sentence above?
This is from a journal. I couldn't understand what is happening after word dated. What is significance of comma after dated like is it dividing a clause? What is as doing to essays by Braybrooke and Christopher? Is it coordinating comparison or subordinating comparison? Is it saying that Braybrooke and Christopher essays are not outdated or similarly outdated like that of Jack's?
Edit1: Adding whole passage, its not jack(I made up name for posting here, besides this name, everything as per passage) Also the author is pretty well known literary critic. So
Passage Source: College Literature Journal by John Hopkins University, Vol 11, Issue 1
Title : Trends on George Orwell Criticism
Author: Paul Schlueter
This is the entire passage for context purposes
B. 5: Religious Approaches to Orwell
Given the apocalyptic nature of Orwell's best-known novels, it is not surprising that religious as well as political perceptions and interpretations of Orwell are common. In addition to the many superficial treatments of Orwell's work found in well-meaning warnings about the "last days" of the earth, there have been a few such studies worth a glance by virtue of their scholarly solidity, balanced perspective, or overall moderation of tone. Geoffrey Ashe was one of the first to make such an emphasis; his various essays from the 1950's are still readable, though somewhat dated, as, to a greater extent, are those by Neville Braybrooke and Christopher Hollis from the same decade.