Hi,
Considering Microsoft are no longer developing Windows PowerShell and are putting all future development efforts into PowerShell Core, I think the question of whether or not the NetApp PowerShell Toolkit needs to be refreshed to work with PowerShell Core is self evident, and the customer want for it doesn't need to be 'tracked'.
It's better to get started now, rather than trying to work with the angry hords banging at the door.
PowerShell Core 6.0 has just been released RTM (Early Jan 2018) and VMware has surpassed the v1.0 milestone for their PowerCLI Core release - https://labs.vmware.com/flings/powercli-core
I'm looking forward to being able to begin migrating my lab build code which uses Windows, VMware and NetApp PowerShell modules to PowerShell Core in the future. The NetApp Toolkit is now the last piece of the puzzle.
Good luck!
Cheers,
Steve.