Looks like. More recent papers still find vulnerabilities too.
Steelmanning: They're putting the effort in so we don't have to. Either they find a way and it'll be awesome, or at some point they become an object lesson.
edit: Or third path: They muddle along just well enough with a system that can't work in theory, but ends up nearly working in practice, stochastically? (see also: email, wikipedia, or a hundred other broken things that can't possibly work but are still hanging on. )
Steelmanning: They're putting the effort in so we don't have to. Either they find a way and it'll be awesome, or at some point they become an object lesson.
edit: Or third path: They muddle along just well enough with a system that can't work in theory, but ends up nearly working in practice, stochastically? (see also: email, wikipedia, or a hundred other broken things that can't possibly work but are still hanging on. )