Cannot extend the C drive? Reasons why you couldn't increase it despite having unallocated space

When using a Windows PC, you may find that the capacity of your C drive has decreased before you know it.I also install ...
Ars Technica

How do I expand the C drive volume in windows 10?

Just replaced my 256GB boot NVME with a 2TB boot NVME. I cloned the drive before replacing so I wouldn't have to do a fresh install. But now I'm realizing that the built in Disk Management tools don't ...