Almost all L2 textbooks contain passages which use new vocabulary. There seems to be two ways to go about this (both with pros and cons):
The vocabulary of every passage is independent of previous passages. The student can thus skip chapters they don't want, or study it in whatever order they want. If the student cannot handle a given chapter, the rest of the book may still be useful.
Every passage re-uses the vocabulary of previous passages. This way the student gets greater exposure to vocabulary, but the student is expected not to skip passages (there are dependencies). If the student cannot handle a given chapter, then they may need to give up the book.
Question: Is it best practice for a L2 textbook passage to re-use vocabulary from previous passages?
In particular, I'm interested in both what students prefer (after all, if they experience "burn out", they might just give up), and what is better pedagogically.