Depends on what you're building an ARM system for. There are proper ARM servers out there; server work isn't the exclusive domain of x86, after all.
For homelabs, that's out the window. Do whatever you want/fits your needs best. This isn't the place where you'd likely find highly available networks, clustered or highly available services, UPS with battery banks, et. al.
For homelabs, that's out the window. Do whatever you want/fits your needs best. This isn't the place where you'd likely find highly available networks, clustered or highly available services, UPS with battery banks, et. al.