You might get a modest performance improvement. Wifi 6 makes use of multiple antennas to better spatially separate ACKs and other upstream traffic from multiple

You might get a modest performance improvement. Wifi 6 makes use of multiple antennas to better spatially separate ACKs and other upstream traffic from multiple clients even when the packets temporally overlap. The extra bands may also come in handy but some of them may be attenuated by walls and other building materials.