With six 2.4 and 5 GHz antennas each, that's two antennas times three (non-overlapping) channels simultaneously in each band. Assuming it can somehow get device A to communicate on channel A and device B to communicate on channel C, etc., you could avoid some congestion while still allowing all those devices to maximize the available bandwidth.
No $40 routers that I know of do anything like that.
meaning that if everyone in the neighborhood owns one, there will be six times as much congestion and everyone's internet access will be even slower than before!
No $40 routers that I know of do anything like that.