Haptics aren't new though. Being on the trigger itself is the gimmick, the steam controller had haptics as well. You didn't see that spread beyond that one proprietary controller or into other peripherals. No one started adding haptic feedback to WASD so you could feel footsteps, or to mouse buttons to feel effects. Plus, the feature is on two triggers - there are four on a standard controller and the most common control options often swap them around, making them superfluous in the first place.
I've tried, believe me. I've tried Godfall, Control, Demon's Souls and it offers nothing to the control scheme or function. I get why they are there for immersion in those story based, cinematic games but ultimately haptic feedback and adaptive triggers add barriers to my controller. I just don't understand why paddles (or the equivalent) haven't become standard when they reduce barriers and offer so many more options to most types of games. And they don't have to be paddles, as the Deck has shown, they can be nested triggers in the handles. They can duplicate D-Pad buttons, stick presses wihtout needing to move your thumb into awkward positions etc.
If something as functional as back paddles can't become standard, I fail to see how expensive haptic feedback will to be honest.