https://www.polygon.com/2018/10/4/17938646/destiny-2-forsaken-last-wish-raid-prestige-hard-mode

Destiny 2: Forsaken’s Last Wish raid is the best the series has ever had, but it appears that it won’t be evolving like some other raids before it. Bungie announced Thursday in its weekly blog that it will not release a hard mode — traditionally called “Prestige” difficulty in Destiny 2 — for the new raid. This is a first for the Destiny franchise.

The raid team said in the blog post that its intention was always to build a single difficulty for Last Wish, but to make it more rewarding than previous raids. The goal was to create a raid that was the “definitive version” from day one.