I disagree. There are very few heterogenic systems in the enterprise. That is an objective, but the main thing is that we deliver what we're paid to deliver by

I disagree. There are very few heterogenic systems in the enterprise. That is an objective, but the main thing is that we deliver what we're paid to deliver by choosing an appropriate platform. We have Solaris, zSeries, Linux and Windows. We just got rid of AIX. As for minor differences, FreeBSD has a lot of much bigger wins than people realise at first glimpse. The differences are far from minor. For example: ZFS, dtrace, rctl, a scary good IP stack, virtio support, documentation that doesn't suck, a POSIX base, LLVM/clang, a MAC framework that doesn't suck, OpenBSM, CARP and a pile more. Oh plus an automated deployment story that is pretty tidy. Sure we can replicate some of these on CentOS 7 for example with similar tech but the above are a million times more cohesive.