The big deal is that two engine aircraft are now covering the routes that were once only practical (or legal, under ETOPS[0]) with three or four engine planes.

The big deal is that two engine aircraft are now covering the routes that were once only practical (or legal, under ETOPS[0]) with three or four engine planes. This makes them more desirable and helps carriers phase out the larger planes they still have -- none of which are being manufactured anymore. [0] https://en.wikipedia.org/wiki/ETOPS https://en.wikipedia.org/wiki/ETOPS