I just replaced my 2013 Mac Pro's 256 GB factory SSD and an external SSD array with a 4 TB Samsung 990 Pro with one of these in an old Thunderbolt 2 PCIe 2.0 enclosure I had sitting on the shelf, and it works perfectly.
It's obviously limited by Thunderbolt 2 transfer rates, but it's still faster than both the sluggish factory SSD and the SSD RAID, consisting of 4 Samsung 850 Pros in an 8-drive Areca SAS enclosure that also contains 4 2 TB HGST Ultrastars that are somehow still running without a single uncorrectable error after more than 13 years of 24/7 operation in a dusty apartment with questionable climate control.
At this point, my money's on both the enclosure and at least two SSDs failing before any of the hard drives.
I'd say they don't make 'em like they used to, but since I've yet to see a failure or uncorrectable error on any of my newer 8 TB and 16 TB Ultrastars either, I lack data to support this conclusion.
https://www.amazon.com/dp/B0CQZ6SYD1
No tools to insert m.2 nvme stick, easily fits and locks into a pcie slot, without a metal bracket to unscrew/remove.
I don't have a pcie gen 5 system, but the new samsung drives might do 14,800 MB/s
I also love thin ethernet patch cables. and 5-in-1 usb cables for travel.