Gradually, Microsoft is fusing Linux into Windows 10... well, Bash at least. The company crawled a little closer to this goal this week with the latest Insider build (16215), which removed the need for Developer Mode to use the feature.
It's a small change, for sure, but it means that making use of the functionality provided by the Windows Subsystem for Linux is less cumbersome.
As Microsoft's Rich Turner explains, the Developer Mode requirement was purely a precaution:
This restriction was first put in place to safeguard non-technical users from inadvertently using a feature that was, at the time, very new and not yet widely exercised. Over the last year, two major releases, and many updates later, we’re now much more confident of WSL's safety and utility and want to enable more users to take advantage of this valuable toolset.
It's not a free-for-all however. The component still needs to be installed, as the lead image shows and you'll need to reboot, but otherwise it just got easier to crack out Bash on Windows 10.