Its not like a Windows license is expensive, especially for Enterprise clients who can buy blocks of hundreds or thousands of keys. As for performance.. its usualky native hardware (most Chromebooks that Enterprise is looking at are running Intel, usually i3s and i5s, so itd be fine for most enterprise apps which arent usually hardware punishing - just proprietary/Windows only.
Enterprise customers arent buying 200$ Mediatek powered Chromebooks. Theyre spending money on higher-end SKUs (which are still cheaper than Windows machines) and are using ChromeOS for ease of management and IT support. (Enterprise ChromeOS can be managed remotely and en masse easily).
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I was wrong, it was Parallels:
https://www.parallels.com/products/desktop/chrome/