Is Apple Music's Spatial Audio with Dolby Atmos a good thing?

After hearing that Apple Music announces Spatial Audio with Dolby Atmos:will bring Lossless Audio to Entire catalog, I have some questions.

Would anyone know if the music with Spatial Audio mix will be a separate file from the strait stereo mix, or will the only option be the Spatial Audio mix?

Will the Spatial Audio mix have any audible effect on a stereo playback sound? if so, will this effect be an enhancement or distraction for the audiophile?

Long term, if a large quantity of music gets released as Spatial Audio and becomes expected by the common consumer, will this effect be a good thing?

A post was merged into an existing topic: Apple Music may soon offer “hifi” tier