Even though it might be a short-lived standard, the PCIe 4.0 is slowly seeing more adoption, and the latest price cuts for the NVMe 4.0 SSDs should certainly make things more affordable for AMD users who want to pair their Ryzen 3000 CPUs with faster storage solutions.
https://www.notebookcheck.net/1-TB-PCIe-4-0-NVMe-SSDs-get-considerable-price-slashes-now-available-for-only-US-200.439013.0.html
You should mention that the Sabrent has a model available with a massive heatsink for $5-10 more- the one without it is for motherboards with heatsinks built in.
Next gen video cards won't require PCIE 5. The 2080 Ti barely exceeds PCIE 2x16 bandwidth.