According to Herms, Chouzenshu 4 says that Dragon ball has infinite Galaxies.
Apparently, Akira Toriyama opted for the option of Dragon ball Super having countless galaxies based on the premise of what Jaco said.
Just remembering that the Chouzenshuus were directly supervised by Akira Toriyama, they were made in 2014 to introduce dragon ball Super.
So they are valid.
A Dragon ball fan reviewed Chouzenshuu and it already shows the universe of Dragon ball Super:
Scan translation: Galaxy
A cluster of stars at one location in the Universe. United stars form nebulae and several nebulae together form a Galaxy. The 4 Kaiohs who are responsible for the North, South, East and West govern these Galaxies. The division between North, South, East and West was created by the Gods and Kings of Heaven to control/supervise the infinite number of Galaxies in Outer Space.