The focus of the cloud native services adoption spectrum is to demonstrate the amount of cloud vendor services that are in use for the architecture. While the full extent of the services that Netflix uses is unknown, they have publicly disclosed numerous AWS services that help them achieve their architecture. Referring to the mature cloud vendor services diagram in the beginning of this chapter, they certainly use most of the foundational services that fall into the infrastructure: networking, compute, storage, and database tiers. They also use most of the services from the security and application services tier. Finally, they have discussed their usage of lots of services in the management tools, analytics, dev tools, and artificial intelligence tiers. This amount of services usage would classify Netflix as a very mature user of cloud native services, and therefore they have a high maturity on the cloud native services axis. 

It is also important to note that Netflix also uses services that are not in the cloud. They are very vocal that their usage of content delivery networks (CDNs) are considered a core competency for their business to be successful, and therefore they set up and manage their own global content network. This point is made in a blog post at https://media.netflix.com/en/company-blog/how-netflix-works-with-isps-around-the-globe-to-deliver-a-great-viewing-experience by the company in 2016, where they articulated their usage of AWS and CDNs and why they made their decisions:

In addition, there are cases where they choose to use open source tools running on cloud building blocks, like Cassandra for their NoSQL database, or Kafka for their event streams. These architecture decisions are the trade-offs they made to ensure that they are using the best tools for their individual needs, not just what a cloud vendor offers.