If a router could be designated as a tank, the Linksys AC5400 might be it. While already large in physical stature, it’s the power under the hood that makes this unit as robust as it is, even if a good deal of what’s in there can’t be utilized by most devices yet. In many ways, this is a router that is built more for the next year or two than it is for the here and now, and if that appeals to you, the AC5400 worth a look.