I'm playing Final Fantasy VIII Remastered right now and have been reminded of the genius of Triple Triad:
https://youtu.be/264wi-_Yxmw?si=mKghHtyrGGEUQoM9&t=8
Final Fantasy had had minigames before - little sequences in FF7 that wound up as arcade machines in the Gold Saucer, for instance - but Triple Triad was different.
It was a constant presence through the game, for one. It was immediately intuitive, addictive, and with its unforgettable music, iconic - when Shuffle or Boogie hits,
even an assassination attempt on an evil sorceress can be postponed. With Quezacotl's Card Mod ability you can turn cards into items and, frankly, break the game - not a good thing in every respect, but obscure enough to not cause issues in a first-time playthrough, appealingly barmy, and it further cemented Triple Triad into the wider game.
For all these reasons it felt like an inflection point for minigames in RPGs generally, and suddenly there was a tide of imitators. FF9's Tetra Master was the first, but it was clearly worse, which just burnished Triple Triad's brilliance. Gwent is the only imitator that comes close, and it likely owes its existence to Triple Triad. All hail the OG.