[formerly_proven]

PCIe 4.0 SSDs are pretty common nowadays and are basically limited to what PCIe 4.0 x4 can do (around 7 GB/s net throughput).

[menaerus]

I don't think they're that common. You would have to have quite recentish motherboard and CPU that both support PCIe 4.0.

And I'm pretty sure that parent comment doesn't own such a machine because otherwise I'd expect 7-8GB/s figure to be reported in the first place.

[dagmx]

I really doubt they’re that common. They only became available on motherboards fairly recently, and are quite expensive.

I’d guess that they’re a small minority of devices at the moment.

[robocat]

PCIe 5.0 has just recently started showing up on consumer motherboards.

4.0 might not be common, but surprisingly it is now the previous generation!