https://www.polygon.com/2019/3/1/18246332/destiny-2-season-drifter-power-weapon-rocket-grenade-launcher-buff-cluster-nerf

In its latest blog post, This Week at Bungie, the studio outlined some changes headed to Destiny 2’s power slots in Season of the Drifter.

Destiny players have relied on Exotic power weapons for months, leaving their kinetic and energy Exotics to rot in the vault. Players have been rotating Sleeper Simulant, Whisper of the Worm and Thunderlord in and out of their power slots, ignoring non-Exotic power weapons.