Customize speaker selection

I really wish more companies...even mainstream Infinity, Polk, JBL,etc...would offer a stock budget model with the following simple options: a)tweeter upgrade(possible older model or from a line up to reduce R&D costs B)Crossover upgrade option: better caps, etc. C)Internal bracing options D)Single or bi-wire other words... ala carte menu...I know some of the more established higher end companies offer Signature/Hotrod models...which is along the same premise...but this thinking has never "trickled down"...some much for Reaganomics!
One of the main reasons stock budget models cost as little as they do is that assembly process is standardized. Kind of like "You can have your Model-T in any color you like as long as it's black." The minute you clutter up the assembly process with time gobbling (time = money) customizations, cost effectiveness dictates it makes more sense to step up to a standardized higher priced model.
Good point...I was trying to keep my example as simple as possible in terms of extra cost/Labour...