Answer: Wouldn't go past High School English and here is why.
Step-by-step explanation:
English takes a majority in our world today, it will always be spoken, whether 1% of the time or 5%. It has been integrated into our daily lives that even not knowing how to properly speak it is looked down upon. I believes studying English is essentially and will be for centuries to come, but the depth of studying the subject shouldn't go past High School level which incorporates poetic and descriptive inferences through words.
At least that's what I've gotten from it.