That means it takes time, but the results are long-lasting. Once you establish search engine visibility, it will serve your business for years after it’s implemented. That’s not to say that there isn’t any maintenance involved in an organic traffic strategy. The SEO landscape is ever changing. You can’t just “set and forget” your traffic system. The algorithms and ranking factors evolve. You have to keep on top of these changes to maximize your results. With all that said, an organic traffic strategy is as close as you’ll get to a traffic system on autopilot. And just another reason why organic traffic is important.
The piece on generating demand for branded queries rather than just product-based ones is particularly interesting here. It sounds as though it'll be more important than ever to have a strong brand in order to succeed (rather than just having a well-optimized site -- and ideally, having the strategic, technical, and creative sides all working together cohesively). Perhaps it's possible that brand exposure through things like answer boxes can still deliver some value too, even if it's difficult to measure, and CTRs are diminished?
Optimise for your personas, not search engines. First and foremost, write your buyer personas so you know to whom you’re addressing your content. By creating quality educational content that resonates with you>r ideal buyers, you’ll naturally improve your SEO. This means tapping into the main issues of your personas and the keywords they use in search queries. Optimising for search engines alone is useless; all you’ll have is keyword-riddled nonsense.
The term was first used by Internet theorist John Kilroy in a 2004 article on paid search marketing.[citation needed] Because the distinction is important (and because the word "organic" has many metaphorical uses) the term is now in widespread use within the search engine optimization and web marketing industry. As of July 2009, "organic search" is now common currency outside the specialist web marketing industry, even used frequently by Google (throughout the Google Analytics site, for instance).

Well, yes and no. Sure, you can get hit with an algorithm change or penalty that destroys all your traffic. However, if you have good people who know what they are doing, this is not likely to happen, and if it does, it is easy (in most cases) to get your visits back. Panda and Penguin are another story, but if you get hit by those it is typically not accidental.