Ask HN: Is there such a thing as a supercomputer vps?

The nice thing about services like Digital Ocean is that you can start with a small VPS and end up with a bigger one if you need it. But what if you want something much bigger? A long time ago I remember the SGI onyx with 64 processors. I have a multi processor computer for my workstation at this time and I realize that there can be a big drop in performance if a process crosses the cpu interconnect zone when it has too many threads. Digital Ocean's largest VPS could handle perhaps upto 40,000 live video streams on a good day but if you needed double that, now you are in the territory of real engineering. Maybe supercomputer isn't exactly what I am interested in, maybe more like a giant SMP service. Do you have any experience with this sort of thing? I think SGI still vended monster parallel computers at some point recently..