For an example of an SSD review that shows a sustained write test: https://www.tomshardware.com/reviews/samsung-980-m2-nvme-ssd-review/2 https://www.tomshardwa

For an example of an SSD review that shows a sustained write test: https://www.tomshardware.com/reviews/samsung-980-m2-nvme-ssd-review/2 https://www.tomshardware.com/reviews/samsung-980-m2-nvme-ssd... (https://cdn.mos.cms.futurecdn.net/mzdXcBUJUuxkbYfmQigqQE-970-80.png.webp https://cdn.mos.cms.futurecdn.net/mzdXcBUJUuxkbYfmQigqQE-970...) In a 900 second timeframe, the 980 Pro drops down to a bit above 1GB/s, while the worst is somewhere in the tens of MB/s. So there are significant differences in SSD performance profiles which you can only find out about from reviews like this. Similar results here: https://www.anandtech.com/show/16504/the-samsung-ssd-980-500gb-1tb-review/4 https://www.anandtech.com/show/16504/the-samsung-ssd-980-500...