“Given the increase in population of the Frum communities vs the decrease of R/C, I expect to see the R/C/MO congregations being assimilated into the Sephardim. The Sephardim are orthodox but have the attitude of allowing their congregations practice as they see fit. We see this in Israel. Especially among the Mizrahi.”
I am not sure where to begin. It is virtually impossible to imagine R/C mixing in with Sephardim. It is a totally different world. R/C is a invention of the west that is extremely foreign to the middle eastern way of thinking. They cannot understand one each other. Also you seem to be assuming that bec Sephardim are less into externals and don’t care about your shirt color or sho style that people can practice as they see fit. That is certainly not the case Sephardim are interested in tradition as understood by the chachamim.