Re: Cross platform
original MongoDB post lists multiple Solaris distros, none of which run on SPARC
Argle bargle, Solaris is SPARC only, no one uses it on x86!
Nobody in their right mind actually runs Solaris for anything vaguely important on anything other than SPARC!
I can tell you with great assurance that many companies on Wall Street, in retail, and in government, just to name a few markets, ran Solaris on their x86 systems for their very important applications. One of the US' largest supermarket chains ran their entire business on Solaris x86 at one point.
...whether many companies still do is a more interesting question, since Oracle has worked for the last 7 years to make it difficult and expensive to get Solaris for non-Oracle boxes.