Rock 5B+ is not yet released, devs got their samples, and of course it may be changed (like 5B was completely redesigned, all elements moved). For details ask @jack
I suggested that some may need full 4x 3.0 pcie lane and it would be great to do some switching mechanism, maybe even very simple, jumper based. Probably most users will be interested in just single nvme and most of them are using all lanes at full speed. For NAS and 10G obviously two m.2 are better.
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