OpenBGPD - why was it started at all?

been using zebra at work. after lots of patching and fixing the worst bugs, somewhat stable, but still slow and occasional crashes, semi-regular session drops

unfixable, since the design is plain wrong.
cooperative threads
central event queue, where keepalive events starve while session up/down event floods from other peers are processed. meanwhile, existing peers go down because of the missing keepalives.

documentation nonexistant or in japanese, author commercialized the project => dead
quagga forked, improved stuff, but still suffers from the wrong design decisions