The idea of iota is interesting with 0 fee transactions and scalability, however, we don't know how it will work in practice.
quite the contrary, 'WE' as in 'early adopters and participants' have benn running this for ~18 months now and hence have an ever increasingly precise idea how it does work in practice.
which is exactly what occurred in Bitcoin during the early days - FUDders whine and FUD, early adopters get rewarded handsomely for supporting a project against FUD