The areas you'll want to look for as a base are those that can already get connected with the 150Mbps and 300Mbps tiers. These areas are GPON areas and do have newer gear needed for 500Mbps/100Mbps. This doesn't mean that 500Mbps will be available off the bat, but GPON is an essential part of the puzzle. If the max speed is 75Mbps/35Mbps, it's likely a BPON area that is going to need to be upgraded (when?) for 500Mbps speeds.
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