As I use PowerShell 7 RC1, I realise just how true his words were. For me, this is kind of like going from PowerShell 1 to PowerShell 5 - it's that big of an improvement in functionality, usability, and performance.
So what is the takeup of PowerShell 7/Core? Well, turns out there's a web page for that: https://msit.powerbi.com/view?r=eyJrIjoiYTYyN2U3ODgtMjBlMi00MGM1LWI0ZjctMmQ3MzE2ZDNkMzIyIiwidCI6IjcyZjk4OGJmLTg2ZjEtNDFhZi05MWFiLTJkN2NkMDExZGI0NyIsImMiOjV9&pageName=ReportSection5
If you navigate there you see a dashboard like this:
There are two interesting things, to me, about this dashboard. The first is that the bulk of usage is Linux with a small bit of Windows and tiny bit of Mac. But even more interesting, is the spike of usage over weekends for Linux.
As you can see from the overall graphs, usage is growing - I would expect a big increase in Windows come the new year. We'll see!