Normal BPF already worked with seccomp as well, which is outside of networking. But yes, eBPF is a major advancement, i.e. you can program eBPF code in a C lang

Normal BPF already worked with seccomp as well, which is outside of networking. But yes, eBPF is a major advancement, i.e. you can program eBPF code in a C language subset and compile it with LLVM. There's quite some possibilities already used in tracing and networking (here: tc classifier and actions and socket filters).