The term "economy" was first applied to Civ4 by people who were so impressed by the fact you had to balance infrastructure with territory that they wanted to inflate the whole premise. Early on the term was coupled with slider worship, and your magical percentage was taken as some indicator of your "economy's" strength. Nowadays the term has completely outstripped its use, where people constantly speak of "running a _______ economy" like it's some really big deal. The only way I think the use of this terminology could get any more absurd is if people starting talking about how they use the plunder from capturing cities as part of of their "conquest economy." In small doses the term economy might be helpful for coralling people around the idea of a sensible tech order and helpful civics which tend to benefit one set of city improvements over another, but in practice it turns into a great monolithic phantom, where anyone reading this board has to chip through the inflated conceptual cloud to determine, really what the hell a specialist "economy" is. Nowadays hen new or less skilled players face a new challenge of "choosing" which "economy" to "run," you know there is a problem with the semantics, because they game hasn't changed that signifigantly in 2 years. Yet almost every thread in Strategy and Tips now pays homage to this concept that discrete economies exist and that all strategies should be interpreted in terms of "economy."
Well guess what? There is no economy in Civ. Pretending there is started as an intellectual pat on the back and now has a life of its own, just like race. Biologically speaking, there are few reasons to categorize people into different races, but a tradition of doing so has yielded divisions which perpetuate an idea founded on faulty science. The only reason race is being dismantled today is because certain experts have managed to convince a lot of people that more harm is caused by this categorization than good. And it's the same for "economy." We have a thread here of people arguing about what defines each economy and as you can see, some people are quite eager for ever more hyper-ultra-buzzword-separation of terms, whereas others are more inclined to ask, is this actually reasonable?
I think "economy" is no more useful than calling someone a liberal or conservative. A liberal is probably pro-choice, right? But not all liberals are. Many conservatives distrust environmental alarmism don't they? But not every conservative. The term liberal and conservative are essentially a shorthand that is so short on meaning it's useless in all but the broadest useage. So for example, casually refering to your game as "cottage economy" while asking for help might be reasonable as it quickly gives readers a place to begin their analysis, but calling a game where you 1)build as many wonders in one city as possible, 2)settle all your great people in that city, 3)keep opponents fighting each other to slow them down, 4)tech to The Internet then switch to sabuetage, 5)et cetera, calling all this "wonder economy" is about as useless of a term as calling it "space race victory strat." And of course, Obsolete was all but required to term it the wonder economy because everyone else on the board so badly needed "economy" stapled on to something else they couldn't see it as equally viable as beloved CEs and SEs.
There was an early time on this board when people did whatever was optimal for their conditions. If it meant they could build lots of cottages, then they did. If they had more food than they could reasonable make use of, they ran specialists. Later themes of development revealed the viability of bulbing great people to trade techs, and even the recent swing back toward settling great people since it nets better returns in the long run. The problem isn't that people learn about all the different options available to them, it's that when those options are surrounded by semantic barbwire people feel they must choose between them. You don't. You can steal techs when it's cheaper than doing the research yourself, you can run specialists, and cottages, and create lots of hammers, and specalize, and hybridize, and do all of it.
So make this a vote for the "hybrid economy," as the strongest, because it means actually thinking about your game and how to get the most from it. Encouraging anything else is confusing to the newbies, and suprisingly influentual to people who maybe know better. This mirage of "econs" leads people away from the real decisions: how you improve your squares, what civics you run, your longterm victory strategy. CE is good for this and SE is good for this and IE is good for this and where does it ends? As soon as you have 8 "economies" and none of them mutually exclusive you've created a quicksand trap for new players who are going to struggle, struggle, and as threads on this forum often indicate, drown.