[treespace89]

The quote here is the main point. "But if you want to engage with 20+ exchanges, to go to market quickly, and implement continuous performance tuning, you'll choose Java."

The amount of changes you need to make due to customer preferences and regulations is continuous. If it's ok for your system to run in the 100 microsecond range then Java is a clear winner. If you are just focused on a single exchange, running in the same rack as the exchange then of course C or lower is what you will want.