[tptacek]

Ah! That makes so much sense. It hadn't occurred; when we rolled out BPF at Fly, the first thing we did was commit to standardize our kernels. After all, there's not much CO-RE can do about your BPF compiler not having tail calls, or not allowing bounded loops. But we're almost entirely XDP; I can see kernel structs being a much bigger problem for people doing observability work.