> Backed by etcd. Today etcd is a well tested and widely used consistent store with users like Kubernetes, Flannel (now Canal), Fleet, SkyDNS and many others. Building something like etcd requires tons of testing and etcd is becoming the solid go to for this category of distributed problems.

Being built atop something else doesn't mean it inherits all the stability of the underlying system; it's an upper bound not a lower bound.