NDAs without a hard cutoff, maybe a year or two in the future, can get bent.
Especially for artists. Holy shit, do artists get screwed by NDAs. Some people’s portfolios are fucking sparse despite years of doing art five days a week for years and years. If the business just kills the project - tough shit, it’s a secret forever.
To the point we’re still seeing people hesitant to talk about failed games from thirty years ago, even though the company is dead, and the company that bought their corpse is also dead.