This is absolutely true. Many are still running on old-old Mac Pros with Snow Leopard. Upgrades are done when hardware can't keep up anymore, but they also tend

This is absolutely true. Many are still running on old-old Mac Pros with Snow Leopard. Upgrades are done when hardware can't keep up anymore, but they also tend to use big DSP rigs from Avid and UA that remove the CPU bottleneck for major tasks.