...but that fifth dependency makes all the difference!
$ go mod init foo && go get github.com/spf13/cobra && wc -l go.sum
758 go.sum
$ go mod init foo && go get github.com/muesli/coral && wc -l go.sum
10 go.sum
(Number of lines in go.sum != number of transitive dependencies, of course, but the scale of the difference still hints at how much extra is being pulled into your project.)