I feel it's high time to add a native Get-Uptime cmdlet and present uniform system uptime statistics across all supported platforms:

Example:
https://www.powershellgallery.com/packages/get-uptime/1.1/Content/get-uptime.ps1

Which returns:
12:37:27 AM up 0 days, 4 hours, 26 minutes, 8 seconds

We should also have a -Seconds parameter, in case people want to pipe this through and quickly parse a long.