If you have a basic idea of how high availability apps and databases work and you write code that isn't woefully inefficient, it's trivial. Lambda scales prett

If you have a basic idea of how high availability apps and databases work and you write code that isn't woefully inefficient, it's trivial. Lambda scales pretty much infinitely. EC2 autoscaling instances behind a load balancer provide a ton of horsepower. Throw in a CDN where it is appropriate. Some of those terms are AWS specific but you can do the same on other providers. Even basic configurations of old school relational databases can scale up pretty darn far before you have to worry about them.