@Cynical99 Ubuntu contracts from Canonical cost $1200 per year per server installation in a configuration that would make sense for a mainframe system. That includes virtualized instances of Ubuntu, as well. So, 40 VMs would be $48,000/yr.
Edit: To be clear, Ubuntu gets IBM mainframe support out of it. Canonical is doing the work and they get the monetary benefit out of it. Canonical != Ubuntu
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