And that's why SD-WAN (software defined wide area network) technology now exists. In a lot of ways it is even better than BGP in that you direct traffic based on performance measurements - either actively through SLA tests or passively watching traffic flows and measuring latency. Using BGP routing based on hop counts and AS paths is akin to following road signs rather than getting live routing that knows traffic for instance from Google Maps
SD-WAN technology also creates a number of new ways for unthinking people to shoot themselves in the foot.
Noction is a wonderful example of this. It has sane defaults, but insane customers, who think that it’s a good idea for them to originate more specifics for other outside networks, because they’ll never leak them outside of their own AS (narrator: of course, the prefixes leaked).
I think the most notable example of this recently was Verizon (the insane customer) using Noction (the SD-WAN technology) and doing exactly that, causing mass traffic disruption as they announced more specifics for other peoples prefixes, drawing all that traffic to their own network instead.
