I've read it three times now. The only thing they say about it is this:
"This doesn't mean that eBPF has solved nothing, substituting a vendor's bug for its own. Fixing these bugs in eBPF means fixing these bugs for all eBPF vendors, and more quickly improving the security of everyone."
Which is exactly what I'm asking about. If eBPF has some inherent advantage, why did it fail in precisely the same way alreay?