FreeBSD has integrated libxo[0] into a lot of its base utilities, so you can use something like `netstat --libxo json` to get structured data that can be sliced and diced with other tools. Unfortunately, it hasn't been extended to all of the base system yet (ls, for example, doesn't support libxo output).

For example:

    $ w --libxo json|json_pp
    {
       "uptime-information" : {
          "days" : 46,
          "hours" : 22,
          "load-average-1" : 0.19,
          "load-average-15" : 0.13,
          "load-average-5" : 0.12,
          "minutes" : 11,
          "seconds" : 34,
    [...]

Obviously it's not as extensive as PowerShell, but it definitely gets rid of screen-scraping.

[0] https://www.freebsd.org/cgi/man.cgi?query=libxo&sektion=3&fo...