[elil17]

> I assume you are basing this on second hand information, or “really strong evidence” is doing a lot of work here, but volumes have been written about the efficacy of comprehensible input in foreign language learning.

What I really mean to say is that there's no strong evidence that CI is more efficient than other language learning methods.

>the folks who reach higher levels of proficient (B2 or higher to be somewhat arbitrary)

Realistically, this is a small subset of language learners. Most people vastly overestimate the level of proficiency they are going for. People also underestimate just what a high level B2 is.