Oops! It seems I did not do my homework properly. I could not find any referral to NVMe when I checked the SSD 600P Series specs earlier, but I must have overlooked it somehow. Sorry!
Does this mean the solution for my kernel panic problem is buying another SSD?
In the topic I referred to in my original post Danny Dulai suggests this might be the solution in that situation, but I cannot find a clear confirmation of his assumption.