Greg Ferro of EtherealMind comments:
For network engineers, Linux skills offer a better career path. Networking, like other IT disciplines, has been isolated & siloed for a number of years with high barriers to entry such as arcane user interfaces, poor user experience and lack of visibility means. So-called engineer skills are focussed on interpreting available data instead of performing more useful business-focused actions – faster, cheaper or better.
Greg has great points here about the coming shift to Linux running on network equipment. It’s no longer a matter of if but when.