If we go by the current consensus in the field of SLA, it’s more balanced:
- Comprehensible input is essential
- Other things matter, too: output, interaction, attention, feedback, recall, etc
- Adults don’t learn like children, and “CI-only” or ALG-style approaches aren’t really how children learn either.
The more dogmatic/extreme claims like “input alone is sufficient” (Krashen), or that “analyzing/learning” can harm potential (ALG) are not supported by evidence.
We just had a discussion about this last week. (You can skip the political parts) : Why the "Comprehensible Input" Obsession is Holding You Back