Last stable update was 2017. In 2018 there was no update from April to December. On the first quarter of 2019 there were some news about the author, in May 2019 (last update) author updated around 10 chapters (?).
From 2013-2017 the author updated 1400 chapters.
I think the story still needs 1000-1500 chapters depending on the author. Assuming there was no issue on the author's side this story has already ended or at the last arc at least.
If the author continues it will take another 3 years. How I wish that the author is always healthy and motivated to write this novel. But gosh! There was no ifs! The reality is that we have to wait for the author to update and another 3 years onwards to finish this.