The latest Creators update uses 16.04 LTS.
you can't send a ping without an admin level windows shell
The latest Creators update supports ping as a non-admin.
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I would say that for most usages it is a good replacement for vanilla Ubuntu. Microsoft is quickly closing the gaps in support. Most stuff simply works (albeit disk filesystem I/O is still a bit slow). For instance, I used it to compile packages for Ubuntu 16.04 and upload it to a PPA without much trouble. At the time the only change I had to make was using fakeroot-tcp rather than regular fakeroot. But maybe that is fixed now.
It is especially useful if you like to work in a Unix, but also need Microsoft Office, Adobe Creative Suite, or other applications that are not available on Linux.