Looks like a mainframe computer and their selling point is that the operating system is open source.
I have no idea why you'd buy that over any of the more established players that have a proven track record of being able to support these multi-million dollar machines for many years.
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I'd argue there's not that great of a track record, legacy vendors are being legally forced to provide better support for their closed-source systems in the EU because it generally isn't very good. Also you're usually buying hardware and software that weren't designed together which comes with many sharp edges we're solving for.