https://fivebooks.com/best-books/james-turner-on-philology/ gives a handy introduction to some key works about the 'pre-history' of modern humanities, with James Turner's answer here being the perfect explanation for why I never feel at home as a professor despite doing everything, outwardly, that would seem to say otherwise.
So do you think there should be philologists in universities now, studying this broad range of subjects? Or is that impossible?
I think it’s very difficult, not for any intellectually solid reason, but because of the institutions that have grown up around disciplines. For example, if you are an assistant professor of art history in an American university and you write a book about Dante, you’re going to get fired. You’re certainly not going to get tenure. It’s very difficult for people to ignore the present disciplinary boundaries and get away with it in the structure of the modern university. People who are not hampered by universities can do this kind of work and they should. People who are old and in no danger of losing their jobs can write a book like I wrote.
One correction there. It's impossible for anyone not already at the twilight of their career to do this kind of work. Not difficult. Impossible.