I have been using a NVME. I think they are worth it now.
I use a WD SN750 PCIe 3.0 x 4 M.2 NVME in my main PC. I find it the best compromise in quality, price and performance.
SATA based SSDs are just like $10-$20 cheaper than NVMEs when on sale. The 1TB size is best value I think.
I find NVMEs are useful for Virtual Machines and large file transfer.
So if you do these things and have an empty NVME M.2 slot, go buy a NVME.