isbaremetal

Storage and backup servers.
Restores cost nothing.

Large arrays fed over a port with no counter. Metered hosting makes writing a backup cheap and reading it back expensive, which is exactly the wrong way round.

traffic
unmetered ingress and egress
disks
large arrays, sized with the build
raid
software by default, hardware on request
port
1, 10, 100 Gbps
addressing
2 × IPv4 + native IPv6
access
root and IPMI
operating system
any Linux distribution, mount your own ISO over IPMI, Proxmox or VMware ESXi
locations
AMS · NL · MEP · NL · IAD · US-EAST · PHX · US-WEST

A custom build in almost every case — capacity is the whole point, and the stock list is sized for compute.