I&#x27;d argue two points here: Recruiting and technical debt.<p>There may be challenges getting the talent you want with legacy systems and I believe you&#x27;re building a technical debt as you&#x27;ll hit a wall with your infrastructure and have to upgrade&#x2F;migrate one day anyway.<p>The top comments on this posting are ex-employees talking about how they&#x27;ve been migrating many (most?) parts of the system to C++, so yeah, even Bloomberg management agrees staying on FORTRAN is probably a bad idea.