I'm not sure I would call that "adoption", so much as "compatibility with", since the default line ending produced by Windows software is still almost always \r\n for files created from scratch.
It ultimately also doesn't really present these files correctly. The last LF is still presented as an empty line at the end of the document. Someone reported that, and they added the option to hide the "trailing newline" to address it, but it effectively only stops displaying it, while you can still navigate to it. I ended up reporting simply that it doesn't handle POSIX text files correctly, describing the problem and the issues with the current attempts at solutions, but it was classified as a feature request and eventually closed due to losing some kind of popularity contest they have for these.
Seemed like such a basic function for a text editor and a dysfunctional response to my report, so quickly gave up on using it.