You're making these statements as if the example you're presenting is the only one of its kind that has these properties. It's simply not the case. You can use

You're making these statements as if the example you're presenting is the only one of its kind that has these properties. It's simply not the case. You can use middleware in other frameworks just as well. You can do input validation in other frameworks just as well. You can also class-based route handler encapsulation in other languages just as well. And I'd argue it looks _significantly_ cleaner than whatever is going on in ASP.NET land. I'd really encourage you to explore other languages. If you're one of those "JavaScript is bad" people, there's plenty of others: Go, Ruby, Python... I'm surprised to be seeing this kind of comment on Hacker News to be honest.