Legitimate question.

Not many do. There are quite a few things I build myself if I really really want to use it. A lot of the time it isn't worth it.

I would totally be using MongoDB for some projects (it fits the bill -perfectly-), but my resources for those are usually limited to Solaris on SPARC.

I do have an x86 desktop with Linux as my main PC at work, so I don't miss out on all the fun completely.

However, I do mostly sysadmin stuff, so a lot of the things I use come in the form of scripts, so it's often cross-platform.

Though I do come across some install scripts that just blatantly assume that everything is running Bash on Linux. Those are fun.

I have very little expectation that the MongoDB team will ever push a non x86 version. They do a lot of optimisations deep inside that rely on architecture specific things. But one can hope :)

Lots of big companies, mostly infrastructure like telecom or tv, use Solaris still. Unless the project aims to support those uses, it usually isn't worth their time.