There are a huge number of professional applications using PCIe cards in Mac Pros. I've seen some hundreds of installations in media centers. While I see their

There are a huge number of professional applications using PCIe cards in Mac Pros. I've seen some hundreds of installations in media centers. While I see their point, it would be a horror story if the Mac Pro were discontinued before developers moved to a format away from PCIe (thunderbolt-driven dedicated DSP processing?).