Not really. Most new web application development is static to begin with, all of the code is delivered to the client browser and cached. Data is handled through traditional API's.
The difference is that you drop your static front-end code (HTML, CSS, JS) onto object storage and your API's are created in async lambdas or functions.
You're still using OAuth2 for API security.
Now, learning how to do this in AWS or Azure from a DevOps perspective is definitely a paradigm shift, but the benefits far outweigh the learning-curve concerns.
The difference is that you drop your static front-end code (HTML, CSS, JS) onto object storage and your API's are created in async lambdas or functions.
You're still using OAuth2 for API security.
Now, learning how to do this in AWS or Azure from a DevOps perspective is definitely a paradigm shift, but the benefits far outweigh the learning-curve concerns.