Best boot strategy for BPI-R4: eMMC/NAND -> NVMe with SD fallback + Frank’s U-Boot?

Banana Pi Router design BPI-R4/BPI-R4 Pro(MT7988)
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had not tested other uart adapters on r4 too…but R4 have wifi-frontends not on-board like R3…possibly the mpcie connector (and circuit for it) between is isolation enough against this issue :wink: