Eagle is far from an industry standard. In fact I don't remember hearing about a single company who uses it. Perhaps some small companies preferred Eagle. In industry it is far more common to see hardware companies use Altium, OrCad, Cadence, or even Mentor Graphics. I've also heard of one company who uses KiCad.

One of the big drivers for which EDA tool suite hardware companies choose is integration/compatibility with their Product Lifecycle Management (PLM) tools. My understanding is the bigger tools have better solutions for this than Eagle.