Red Hat has a similar eBPF based tool https://github.com/netobserv/network-observability-operator (Disclaimer: i work on it) - the cool thing imho with retina or redhat netobserv or pixie is they aren't tied to a specific CNI. Now one of the problems that arises is potential conflicts and lack of collaboration between eBPF based tools, as there are more and more. Something called bpfman aims to address this aspect