4K80 doesn’t exist yet.
And you do realize that the difference between 2.35:1 and 2.39:1 is basically unnoticeable, right?
That and, further, the fact that film projection was sufficiently imprecise that there’s no point trying to match the theatrical aspect ratio precisely. I say the same thing when people complain about 1.85:1 movies being released on Blu in 1.78:1. Nothing revealed by the slightly opened matte that thousands didn’t see in the theater. Well within what DPs protect for.