I'm not sure this is really the right forum for this facet of the discussion, but..
"routers with faster bgp implemetations are what is needed" is what we say, but the question a vendor asks is "does it increase my profit margin, revenues, or market position?". what we "want" is mostly irrelevant.
Don't you think introducing something which is A) In significant demand, and B) Nobody else has, generally works to increase one's market share? Sure, for various handy features and widgets, you can tell the vendor how much you want them all day and nothing will get done. Why? Because although it would be damn handy, and although it might be unique in the market, it's not actually something which is going to sway a lot of purchasing decisions -- if it's not a big enough feature that you can convince management you should switch from Vendor A to Vendor B just because vendor B has the feature, then it's not going to affect the current balance of market share very much. They're better off spending their money on marketing to attract new customers than on developing your new widget. On the other hand, arguments like "it will significantly improve the quality of service we can provide to our customers" or "it will reduce our operating costs by allowing us to more efficiently route traffic", tend to more directly impact purchasing decisions. This then represents a real incentive for vendors. Really, this seems like kind of a silly argument -- do you honestly think routers are going to start geting slower and decreasing in capacity?