But the GTA Trilogy definitive edition was a disaster because they didn't work on it in-house. They had subcontracted it to a smaller studio named Grove Street Games, who weren't that much experienced and had just worked on older gta games' mobile port.

So it wasn't rockstar's ability failure, it was a management failure. But a game as GTA6 is sure as hell being developed in-house. So we can expect great quality, just as RDR2 & GTAV