Demon's souls didn't sell very well. It was Dark souls that took off.
Right, I mixed two things together. Though, them already publishing Demon's Souls helped to get Dark Souls as well.
But the interview is "Miyazaki stood in the back and I spent 5 hours talking to Adam and recording lines in what could have been done in 10 minutes". Which isn't a glowing endorsement. Sounds wasteful and hard on people's voices for no reason.
Based on the performance it was well worth it. I remember people making fun of English Gyobu Masataka Oniwa voice acting in Sekiro and memeing it because it felt kinda funny.
Igon's voice lines are being almost worshipped, it sounds so powerful and sincere. There's a lot of memes with his voice and they all fucking badass. You can't make something like this in 10 minutes.
Not summoning Igon for Bayle is playing the game wrong™, and it's all thanks to his voice acting.