and when you are trough with these, the original deus ex is still an awesome game.

The main thing that got very old between the game release and nowadays is that conspiracy theory were a joke in 2000, but twenty years later they are taken very seriously by way too many people, including the current US president.

Also, this kind of game is often called "immersive sim", it has seen a mini resurgence in the last years.

Breath of the wild fits in that genre as well, so does MGS5 or Rimworld. They are all very different from Deus Ex, so it really depends on what you liked in that game.