GitHub is just the distribution here, and software licenses are subject to change. That's the embrace portion.
Hypothetically, Powershell becomes widely used on Unix, and Microsoft releases Powershell 2, which extends Powershell. This version only runs on Windows and contains killer features. These new features can't be implemented from the GitHub source either technically or because of intellectual property. That's the extinguish step.
The purpose of EEE is to extinguish a technology. Your situation doesn't hold up because PowerShell is MIT licensed. Even is Microsoft did release a new version that was Windows only (which, given their use case, makes no sense), there's nothing stopping the community from forking the repo and adding those features, or porting those features to another technology.
People will continue to trumpet the sound EEE banner every time Microsoft does something that people like. The problem is that waging an EEE campaign with MIT licensed technologies on Github is extremely ineffective. Also, it's pretty clear that while Windows is still a big part of Microsoft, they are trying to move beyond the desktop. The rise of macOS, the proliferation of mobile devices with iOS and Android, all these developments have caused the company to shift its strategy to the cloud, namely Azure. Even in that space, they can't wage an EEE campaign, because with competitors like Amazon and Google, there's no way they can lock you into Azure
Times have changed, and so has the company's strategy. Whether or not the company's culture has changed is not something I am concerned with. They have enough watchers that call them out, like with the Windows 10 update debacle and the collection of telemetry data. I am more interested in their actions with regards to their technology, because it's my opinion that have some of the best people working on languages and tools.
