I can see a very valuable use case for being able to intercept method calls and attribute lookups to do input validation, logging, etc. But being able to dynami

I can see a very valuable use case for being able to intercept method calls and attribute lookups to do input validation, logging, etc. But being able to dynamically decide which attributes exists sounds like a nightmare from a code-analysis perspective. Python has had the __getattr__, __setattr__ and friends and once you start using them to be "creative" all static type checkers break down. They are usually frowned upon. Let's hope typescript is able to interpret these Proxy objects and that the community don't abuse them for all kinds of strange things.