Your premise is right on the money. The Cubs are pretty well set through 2021. The Brewers need a lot to go right in any particular year between now and then just to get to the position they are in now. I disagree that the Cubs are set to be a perennial powerhouse. Now that may change with a few big ticket FA signings that they are capable of (Yu, Harper) but those aren't a given. As is, I see 2 top players on their roster, Rizzo and Bryant. Go around the diamond and it is a lot of average players - Baez, Russel, Almora aren't world beaters. Happ could be good but isn't a stud yet. Heyward? Schwarber could turn it around but the best he'll become is an 850 OPS liability in the field. They don't have young stud pitchers other than Quintana I guess. Their minors are emptied mostly. Basically they are reliant on FA signings.