There's no reason to think most of the SaaS tools being bought are complementary to the products and services they are being used to produce. For example, if I

There's no reason to think most of the SaaS tools being bought are complementary to the products and services they are being used to produce. For example, if I'm a car manufacturer using software tools for engineering, sales, inventory management, payroll, etc., the software tools are not a complement to what I sell, they are just a production cost.