Rockstar phased out the Rockstar Creator and Rockstar Editor. Reasons and what it could mean for GTA 6.

What was retired

Rockstar Editor (Rockstar's gameplay capture software). The Rockstar Creator's various editor modes. Both faded with time as the platform's focus shifted to live-service business content.

Implying Rockstar might not develop user-creator tooling for GTA 6 either.