A problem that the DAGs seem to face is that integration with an exchange is a much more difficult process. At least with XRB (Which I am most familiar with) ea

A problem that the DAGs seem to face is that integration with an exchange is a much more difficult process. At least with XRB (Which I am most familiar with) each exchange has to set up multiple hot wallets and ensure they are kept in sync. I think XRB is now exchanged on 3-4 sites and they all only have various levels of support. I think the DAGs (XRB, Byteball, IOTA and likely many more I am unaware of) have the potential to be very useful for microtransactions.