A professor at my University mentioned that when he was a student, the professors at that time claimed that the security of BGP is a solved problem and nobody is going to talk about it in ~2 years. This was +20 years ago. He has spent a lot of his research on an alternative for BGP called SCION[1], as the adaption of BGPSec is not very straight forward and rather an ugly fix.
I think it is pretty interesting that the problems of BGP are not discussed more widely and often.
[1] https://www.scion-architecture.net/