How it exactly is it a "crippled vision"? There are tons and tons of code that I write every day that I'm able to separate out like this. Honestly there is wa

How it exactly is it a "crippled vision"? There are tons and tons of code that I write every day that I'm able to separate out like this. Honestly there is way more code that you can reason about in this way then not reason about in this way. This isn't some academic exercise, people right functional code that operate in this way and do a lot of useful things everyday.