Literacy seems to make sense to me but I might be missing something in the post. Writing is language and language is communication so at least two sides.
As more people learned to read, they also learned to write, and written communications increases. However, even with modest literacy one can read a long sentence. Or can do that when it is written by a good/skilled writer. But being able to read does not really lead to writing skills in most cases I suspect.
As more people started communicating via writing (think things like schools and education expansion) the skill level of the average writer likely declined. That probably lead to training next generation writes to write in a more simple sentence structure.
That is pretty much what I’m trying to accomplish and want to try to increase the rate I am building the working vocabulary.
I do agree with both you and Vaughn. Reading should (very hard for me now) really help improving the recall once I can read and have a sufficient understanding of the statement and larger text. Texting is (I have been able to do some) good for me in that it tends to keep the exchange short and sentence structure more simple and short (which means I typically will have a reasonable grasp of the general meaning so can better infer what the unknown word or unrecalled word likely means.)