One comment regarding your "performance comparison" graph. Is the "dd" result read or write? I wondered the same thing with your Compute Module 4 post.
It's write speed; sorry about that, I should probably be more specific! All the benchmarks I'm using are from this Wiki page (http://www.pidramble.com/wiki/benchmarks/microsd-cards) — though I need to update that page to include some more USB/SATA/NVMe performance benchmarks since I'm now using a lot more drives with the Pi 4 and CM4 (and skipping microSD entirely for most builds).
