I liked the clothing Vito wore as an old man. Just what we used to call "old clothes." He would certainly never have spent the money to look sharp in the privcy of his mall and tomato garden.
I liked it, too.
When I was very young, we lived in a part of the East New York, Brooklyn, neighborhood that was overwhelmingly Sicilian. Every middle aged or older man dressed
exactly as Vito did in that scene, tending their tomatoes, except they all had gabardine caps.