[webmaven]

> Should I run Windows, Plan9, Solaris, FreeBSD, NetBSD, and Linux on my 5 servers to ensure I have diversity?

No. At the scale of five servers, a monoculture is acceptable risk, and as long as other businesses at that scale are choosing different monocultures, the systemic risk is limited as well.

But in analogy to agricultural monocultures, larger fields make monocultures more dangerous, and many adjacent fields with the same monoculture increase the risk even more.

But geographic continuity isn't necessary in our networked world, so the analogy is of limited use, and any vendor with enough customers, no matter how spread out, makes an attractive target.