I was not brave enough to apply the VCONN hardware fix to my @PINE64#Pinephone so I replaced the mainboard with the new one (3GB RAM, 32GB EMMC) aaaand... it worked!
@Blort I haven't done extensive test since I've upgraded the board, so I cannot say for now. But I did notice that it built Amazfish without using the swap, so, yeah, the additional RAM is useful !