Will you use PureOS or another distro?

You mean PowerShell? PowerShell core (rebranded to just PowerShell as of version 7) is open source and available for Linux. It works really well and I personally like the Verb-Noun syntax.

I don’t think we’ll end up with a MS Linux distribution, but I do think more and more of their applications making their way over is something we’ll get over the next several years.