The idea that assets under management size intrinsically limits sustained alpha deserves a more nuanced analysis than outright invalidation by a single case. Berkshire Hathaway's outperformance, with a ratio of 1.88x relative to the S&P 500 over six decades, indicates that the impact of size can be conditional, not absolute. Our analysis assigns a reduced impact score to size constraints for entities with integrated business models or flexible investment mandates, such as acquiring a company like Burlington Northern Santa Fe.