I'm reasonably sure we could increase blocksize by 20x or more (and the resulting traffic) without much stress on the hived nodes. BitShares creates blocks up to at least 1MB, IIRC, and even that was a somewhat arbitrary limit we set.
The more likely stress point right now would be hivemind, but I'm sure further optimizations could be made there to alleviate any such issue.
But you're right, for now there's no strong reason for witnesses to vote to increase the block size yet, I think. It's done by median of witness consensus voting, so we can rapidly change it if it that seems like a good thing to do at some point due to traffic increases.
thanks for answer :)
That's good to hear from you! :) Long-term IMO hive will have no scaling issues, adopt if needed is the best and most cost-efficient thing we can have.