This move prompted me to pay tribute to DC's New York offices on my blog last week--see OTF.12.11.13
It depends what old days we're talking about, but back in the old old days, you had to live in the New York area to be a part of the comic book business. Yeah, in the '50s, '60s and '70s, you see more and more freelance writers and artists reloacting to other parts of the country and even going outside of the country.
Although, it's interesting that John Broome spent half of the year in Paris with his wife and daughter, but came to New York with his wife for the other half of the year, during the '60s. Yet he didn't write from abroad--He only wrote when he was in New York and Julie Schwartz saved up those scripts for the rest of the year.
In '67, when Edmond Hamilton set out on a year long tour to far off places with his wife, Leigh Brackett, he didn't continue as a freelance writer for DC, but rather decided he had to retire from the business--although he had been sending his scripts via mail to their offices from his Ohio rural home since the late '40s.
In the '70s, when Steve Englehart wrote his famous Batman and Justice League stories for Julie Schwartz, Englehart did that in New York before leaving for Paris, where he would be cut off from comic book writing.
Given that the book and magazine publishing business is centred in New York City, most professionals who want to work in the business with the big boys relocate to that area to get jobs at those offices.
I can see DC Entertainment's head offfice locating operations on the west coast--but I don't understand why the publishing end of things has to be there, given that New York is the hub of the publishing business. And there are people in the industry who have lived their whole lives there. They've rasied their families there, put down roots in the community. This move will force those people to choose between their job and their home life--with some probably being forced to quit because they can't transplant their whole family to the other side of the country.
The email argument works both ways. If a lot of this work can be done electronically, then why bother moving? To the extent that they need to have a physical publishing office somewhere--New York seems like a better place for that office.
It strikes me that this is one more move toward ending DC's invovlemnt with publishing comics and focusing them on other platforms.