Allocating virtually any budget across two channels will result in better sound quality than twelve…assuming a properly set up room. And properly setting up a 12-channel system is a monumental task. Most hi-fi enthusiasts struggle to get 2-channel systems really dialed in.
I've seen zero evidence that most artists are adopting object-based audio. In fact, of the hundreds of Blu-ray movies I've purchased, only a few dozen have Dolby Atmos or DTS:X audio.
However, I see several YouTube videos from music producers stating that object-based audio makes little financial sense. And others decry poor mastering quality, as also seen in this thread.
I want to be supportive; however, I sincerely hope that all of the various object-based solutions for music will die as fast as they arrived. And don't get me started on Dolby Atmos for headphones and soundbars. Ugh!