Cyberpunk 2077 looks to be a pretty long game, at least for stealth players.
About Cyberpunk 2077:
Although it isn’t specifically a stealth game, Cyberpunk 2077 features some interesting mechanics for fans of stealth gameplay. Hacking, in particular, proved to be an incredible strategy for stealthy players to succeed. Well past launch the game has improved significantly, and future DLC will expand the already large (and yet dense) game world even further.