At resin.io we keep looking for a solid arm host, as we are currently emulating a ton of arm builds on x86. I guess our use case is somewhat unique, but we still haven't found something that works for us.
Totally offtopic (sorry) but when I saw you mention "resin.io" I immediately thought about the java appserver from caucho which was a pretty okay product back in the day; I assume you're not related?