Ah, forgot part - as I currently understand the op_return thing, stuff put there is prunable. If that's wrong, someone please tell me, cuz that's really important I think. I've been mostly against the op_return change, because it looks like an inelegant solution imo - elegant would be reverting at least part of taproot or the witness discount - but if its prunable then it might not be as bad as it seems. Then the next question after that is : can lightning work (or be made to work) on a pruned node (currently no). My lack of knowledge here is forcing me to emphasize the "stay humble" part of Odell's phrase.