Today, I bumped into a client of mine from https://cryptotraderspro.com/ & the gas station clerk recognized me from my crypto live casts on facebook. I was wearing a BCH shirt too, so we had a good talk about it.
Assuming one posts 20 messages a day, with the highest per post cost I've seen at ~400 sats, it will cost each user 0.02688 BCH to use Memo each year. If BCH reaches $8500, that will be $228.48!
ETH's "gas" is great from a UX perspective, but it's just an abstraction. How would USD/B work?
Mailing miners paper cash? Transaction fees need to be in the coin of the realm.