Now that I completely agree with. I was there when the infamous “Java enterprise architects” ran rampant and ripped companies off of millions of dollars so I definitely have some PTSD about it. 
Yes and no. If you use some well-known Elixir flavour of doing things (like configuring implementations and using dynamic dispatch) from the get go then this allows you to juggle a lot of complexity in the future. All that’s necessary is being a little clever at the start – but not too clever so as to lock yourself into a certain paradigm that might indeed turn out to be ill-advised 300k coding lines later.
I am not disagreeing with you – I am simply adding the nuance that we have it easier in FP. I’ve had to refactor and re-adapt huge Java and Ruby codebases in the past and that’s basically a perfect way to want to commit suicide.
