I've been using sed, awk, and friends for I find myself reaching for 30+ years, refer to jq documentation 90% of the time I use it (vs. <<10% when using traditional UNIX tools), and still appreciate JSON output as an option.

Incidentally, PowerShell has nice built-in facilities for working with JSON:

  /Users/jtm> (
  >>   diskutil list -plist `                                                                        
  >>     | plutil -convert json -o - - `
  >>     | ConvertFrom-Json
  >> ).AllDisksAndPartitions.APFSVolumes `
  >>   | where MountPoint `
  >>   | select `
  >>       VolumeName,`
  >>       @{L='Size';E={$_.Size/1GB}},`
  >>       @{L='Free';E={($_.Size - $_.CapacityInUse)/1GB}} `
  >>   | where {
  >>       $_.Free / $_.Size -lt 0.10
  >>   } `
  >>   | sort VolumeName `
  >>   | ConvertTo-Json
  [
    {
      "VolumeName": "Gríðarvölr",
      "Size": 1862.8213348388672,
      "Free": 150.1973648071289
    },
    {
      "VolumeName": "Mjölnir",
      "Size": 1862.6963348388672,
      "Free": 92.34595108032227
    }
  ]