I buy LP's because I like the sound of well-mastered, well-pressed ones, but even more important to me is the 12x12 physical size of the object; some people DO care about things like being able to see the artwork and be able to read lyrics and credits without needing a magnifying glass.
Nothing to do with 'nostalgia' for me - I'm 72 and went without playing any vinyl for over 25 years - all about the sound and the 12x12 artwork. I also buy a lot of box sets, both vinyl and CD; there is some great packaging both ways....
But 'back for good'? I don't think such a concept exists; there's a lot of future left, I hope.