THANK YOU!

Long story short, I was "attempting" to use Adobe Bridge for culling and it was a nightmare... stuck on generating previews...slow...system unresponsive... 
Gave FRV a go and Wow. Even on network shares, it absolutely flies. Just made culling a breeze and now I can carry on using my 2015 macbook pro without upgrading to an M!
So thank you for an awesome software!
Note: This was using Nikon Z8 HE* raws.
Abbas.