LLMs make it easier to bypass the moat, too. They can automate migrations, etc. pretty smoothly.

(Since we're talking about moats and cyber-feudalism, where does siege warfare come in?)

Since siege warfare is about bringing down the fortifications and a moat is part of those fortifications, cyber siege may be something akin to patent trolling or IP copyrights? Fire off dozens or hundreds of claims against your target and drown them in legal costs.