Most airlines do have MAXs. Delta does not. However, they have ordered some MAXs. So they will have MAXs in the future. That will take quite some time however.

Most airlines do have MAXs. Delta does not. However, they have ordered some MAXs. So they will have MAXs in the future. That will take quite some time however. So if it's really that big of an issue for a person, then just fly Delta for the time being.