I finally caught up with the web novel after a friend wouldn't stop recommending it. The setup hooked me immediately—modern guy gets dumped into a weak, minor villain's body in a fantasy novel and decides to just avoid the plot and live a comfy life. It's a subversion I haven't seen executed quite this way; the 'unique plot' isn't about some grand new magic system, but about watching someone use mundane modern knowledge and pure psychological manipulation to turn the entire story on its head. He doesn't fight the hero, he banks on him.
The charm is in the details and the slow burn. You see him making connections, investing in businesses the original story mentioned in passing, and essentially building an economic and information network while everyone else is worried about swords and sorcery. It does require some patience, as the early parts are heavy on setup and the protagonist is deliberately passive, reacting and scheming rather than charging ahead. If you're looking for constant action, you might get bored. But if you enjoy political maneuvering, found family dynamics that actually take time to develop, and a protagonist whose main power is being insanely well-prepared, it's incredibly satisfying. The way the author weaves in the original novel's plot points as obstacles or opportunities for the MC is clever enough to keep me hitting 'next chapter'.
My only gripe is the translation can be a bit clunky in places, but the story itself overcomes it.