Hi ...
I'm not exactly sure on the correct command to get all the not stateless-ready vibs ...
And I can't test at the moment...
I know though, that this command lists if a certain vib is stateless-ready:
PowerCLI C:\> Get-‐EsxSoftwarePackage <name--vib> | Select StatelessReady
Maybe you can test/try to see if it helps you along ...