Sample code to defer PowerShell modules loading.

Microsoft.PowerShellISE_profile.ps1

#Register OnIdle event to load PS moduless.
Register-EngineEvent -SourceIdentifier ([Management.Automation.PsEngineEvent]::OnIdle) -MaxTriggerCount 1 -Action {
    Import-Module TabExpansion++
    #Import-Module FunctionExplorer
    Import-Module VariableExplorer
    Import-Module PSCodeAnalyzer.ISEAddin
    Import-Module Altrive.ISEExtensions

    #Remove current Job (No Need to get job result)
    $EventSubscriber.Action | Remove-Job -Force -ErrorAction Ignore
    #Note:PSModule Loading error is not returned.
} > $null

This is 7 years old and I've only discovered it now!? It's incredibly useful. 👏🏻