I agree with you on the untreated room and 60k amps (just buy hypex), I have a room that is designed by a professional and treated (massive traps completely covering all the walls and ceiling). Most people can’t dedicate the space to that type of setup though - particularly as it completely changes the look of a room.
But something like Trinnov can make a difference to even that setup - its what the acoustician will some days testing and tweaking particular as all speaker designs have flaws. Not that I have one yet, I didn't have the budget for it so I am making do with a cheaper alternative - but DSP for treated rooms makes a noticeable difference.