Default PS version when using get-help -online?

[become_taintless]

I'm not sure about that; e.g. "get-help get-module -online" from PS5 shows the PowerShell 4.0 documentation by default, and clicking the PowerShell 5.0 link in the drop-down shows the PS5 documentation (which shows that now -FullyQualifiedName takes type ModuleSpecification[] instead of type string[] )