Adaptive triggers, if it is what I think it is, sounds like a game changer. Introduced with the DualShock 4 (PS4) IIRC, it means that if you only apply half pressure to the triggers (L2, R2), the game can see how much pressure you are applying and translate that in the game. The best example would be a racing game where you might not want to "put the pedal to the metal" all the time and only push halfway down. When you're coming into a tight bend, you're expected to drift — to pull the handbrake (I think? I suck at these games and especially at drifting) and pull the wheel the other way so you slide. But a normal driver would just ease up on the gas.
Haptics is vibration and I get vibration in my Xbox controllers on my Mac when playing games on Steam. Weird that you wouldn't get it on a PlayStation.
I have a PS3, but I don't think the DS3 is PC/Mac compatible. I think it was either the DS4 or DS5 onward. I know the DS5 is because that's what they show, but I feel like, since the Xbox One controller is PC/Mac compatible, the DS4 should be as well (same gen).