What's changed that requires a change of router? Without knowing what it is that you need that this router doesn't provide it's not possible to recommend anything.Its worked ok for what I needed but I think its time to upgrade.
You’ll still have firmware mismatch limitations in AiMesh. Your new router will be perhaps running 3006 firmware, your old router is locked on 3004. Not all the new main router features will propagate the older node. Something to keep in mind and set realistic expectations.
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