> What other OS could you want, especially on ARM?

OpenBSD. Or any of the BSDs, but OpenBSD would be ideal.

That said, my confidence isn't exactly shaken either by the current lack of BSD availability (FreeBSD is supposedly "coming soon"). I'm getting by moderately well on Linux right now for my own "cloud" needs. It would just be nice to have my preference in operating systme (and ecosystem; I've taken a liking to OpenBSD's subprojects like relayd/httpd, OpenSMTPd, etc., and it's much easier to use these things on OpenBSD - or probably even on FreeBSD - than it is on GNU/Linux).