stateless front ends can't cope with a multiplicity of data stores, so theres' that

there is also the fact that users generally cluster around a section of the data set and this can then be easily the shard they are interested in

generic scaling solutions always start with the assumption you only enter the data from one point, that is stupid because there is billions of us humans, we don't need to concern ourselves with the same things all the time

fiat thinking. followers, sheep, i would say "idiots"