Honestly, at tier 4 the resident party wizard has enough reality-shaping abilities that I find it quite difficult to follow a pre-written adventure without them nuking the entire content and forcing me to improvise.
And considering how badly written most of 5e's campaigns are, I don't think this will solve the issue at all.
That's what I hoped for OneDnD, but after the last playtest, I think it's safe to assume it won't change anything because it would take too much time and effort.
A level 1-10 adventure with a 'bump to lvl 17'? What does that mean? Instantly levelling from 10 to 17, skipping an entire tier? That just sounds silly.
I love epic level campaigns. I love dealing with all the super powerful game breaking magics and abilities. I usually set them in the astral plane, the hells, or more recently, space. I started reading about it's version of space a few months ago and I love everything about it. Space in D&D is fucking gnarly. Like, even the gods of Toril and other planes are afraid of space.