[2021] Grudge Mark Bosses only in Chaos Wastes? Why not in normal runs?

Thing is, Adventure mode is very much well established in both form and overall difficulty. I think adding Grudge Monsters there would be received poorly by many, at least as they are now. Twitch Mode might work as an optional toggle. Or a weekly event. Or something opt in, in some capacity. But adding them to the game mode that's been there for years might rock the boat too much. Penny for people's thoughts though. I'm just spitballing.