I would reverse them when convenient, as there is a slight advantage to the OS being on the NVMe. That said, it will not be a really substantial difference depending on the programs run. One real advantage is if you run any programs like Adobe Photoshop or Premiere or others that use a scratch disk -- just be sure to put the scratch disk file on a different drive than the OS and app drive.
I would reverse them when convenient, as there is a slight advantage to the OS being on the NVMe. That said, it will not be a really substantial difference depending on the programs run. One real advantage is if you run any programs like Adobe Photoshop or Premiere or others that use a scratch disk -- just be sure to put the scratch disk file on a different drive than the OS and app drive.