This is a great article but one thing it doesn’t discuss is the importance of who the underlying cloud provider is. Many companies are pretty locked into AWS for better and for worse, regardless of whether they use things like lambda that are known for lock-in. Just the fact that you can use crunchydata, redis.com, and heroku is a reflection of being on AWS under the hood. Moving to something like fly.io or railway means introducing internet egress between your services.