Microsoft Runs Ubuntu

The latest list of the top 500 supercomputers in the world
<https://top500.org/lists/top500/2023/11/> has, at number 3, a machine
called “Eagle”, which is apparently part of Microsoft’s Azure cloud.
Looking into the details of this <https://top500.org/system/180236/>,
the OS is listed as “Ubuntu 22.04”. And there is another
Microsoft-based super at number 15
<https://top500.org/system/180171/>, obviously older because its OS is
listed as “Ubuntu 20.04”. And at number 23
<https://top500.org/system/180024/>, we have one running “Ubuntu 18.04
LTS”. Then a few more, even older, down in the 50s, all on Ubuntu
16.04 LTS.
Conclusion: they won’t even use their own Windows-based Hyper-V
virtualization architecture on high-performance installations.
The ARM-based Fugaku machine, which was top of the list not so long
ago, has dropped to number 4. Apart from that and two IBM POWER-based
entries, the rest of the top 10 is currently all x86-based.