It's not their fault, as no one but Ian himself knows how much energy technology he possesses, and it's impossible for them to consider the concept of 'perpetual maintenance'.
"Really, is it that impressive?"
Adalbert is a very clever man. He didn't grasp the situation at first, but now his reaction is swift, and he can't help but widen his eyes, "Yes, indeed—it's a method far superior to what the Duke of Sorin had in mind! And it doesn't require a full Deceased Monarch; it's a shelter that people build on their own initiative!"
—Still hung up on that Duke of Sorin, huh? That old thing should have exited the stage long ago.
That's what Ian thought, but he also understood that it was normal for the other party to be fixated, as Deceased Monarch Researchers have always held a grudge, wanting to prove their former employer's strategies were wrong.
However, to tell the truth, it's quite fascinating.