I discussed it with a friend who knows Unraid and Unix a whole lot more than me, and we tried this. I only have two dockers, some plugins but no VMs, so I think I will put the 128 nvme back in and start using it again. Just have to figure out how to put the appdata and dockers on the ssd..
Edit, I just freed up a 480GB Nvme from my gaming PC, I will put it in the Unraid server tomorrow, then I can use the disk as a cache aswell, 128GB isnt quite enough I believe.