> I don’t see how proof of work could possibly be a sustainable strategy to keep bots out without ruining human user experience. It’s an arms race that can’t be won.

You yourself describe the solution.

Extensions or browser integrations of the Anubis task.

He didn’t describe a solution. He described a (crappy) workaround for humans. But the fact is that this cannot and will not stop bots. The people running bots can do the same, even faster.

He did in fact describe it.

I’m left wondering if we disagree about what the problem is.

The problem here is not merely that Anubis is inconvenient to humans. It’s that and also that it’s not very effective for blocking bots. Anything that makes it easier for humans to get past will also make it easier for bots to get past.

The point of contention is not the word "describe", it's the word "solution".