He means that locks anyway have the same problems as atomics on platforms with load locked/store conditional. Therefore yes, that's a problem of the platform, b

He means that locks anyway have the same problems as atomics on platforms with load locked/store conditional. Therefore yes, that's a problem of the platform, but even on arm/ppc atomics scale better than locks. Which is true, but eliminating sharing works even better if possible as proved by the article.