I wanted to know whether Logstash has been completely deprecated to use with Windows OS such as Windows 8, Windows 10 etc.
As per the documentation, there is no clarity whether Logstash is supported on Windows. However, Logstash 5.1.1 still provides zip file which is used with Windows.
But there is one thing in the documentation in Installing Logstash section i.e.
Do not install Logstash into a directory path that contains colon (":") characters
On Windows, it is not at all possible to install in any directory path which will not contain colon characters.
PS: Please mention it clearly in the documentation that Logstash is not supported for Windows & also do not provide the zip package of Logstash-5.1.1.