Although this may very well be the mentality of many rank and file network engineers that you may come across, that wouldn't at all be an accurate representatio

Although this may very well be the mentality of many rank and file network engineers that you may come across, that wouldn't at all be an accurate representation of those in charge of the architecture and design of larger networks. However, even the more open minded engineers tend to be pragmatic, and there have already been numerous proposals or initiatives which are reached near consensus level of acceptance as good ideas such as BCP38, IRR generated prefix lists, etc., but still have abysmal adoption rates. Solutions already exist for most problems, with the ability to implement them on a case by case basis, which would be a much lesser barrier than upending BGP altogether. Throwing BGP out in lieu of a new protocol altogether has an order of magnitude even lower probability of seeing widespread adoption. What's lacking in many existing cases is simply (business) will. There are many businesses who will not allocate resources to make the Internet a better place if it doesn't improve their bottom line, and there are many more businesses who lack the resources to even be able to consider adopting anything beyond the bare minimum. At the heart of it, most carrier networks lose money most quarters, and smaller ISPs barely scrape by. It's only a handful of very large, oligopoly eyeball networks like Comcast that are quite profitable.