Earlier quoted context omitted.
>>> some areas become rich elite enclaves while other areas become basic income ghettos. > This is basically the direction we're already headed in already. A flat basic income would make this better not worse , as there would be more money available serving the needs of people in these poorer areas.
I am inclined to agree with you but I'm not certain. There are some arguments that those living off of BI would form a unique subset of the population and might effectively be ghettoized at least in terms of colocation as opposed to the more economic/social aspect due to their similar needs/means.
The people living primarily off BI (that is "the poor") would likely continue to be segregated, to a certain degree, both physically and socially from those more well-off. But that's not an effect of BI, that's true of the poor now and basically for all of human history.