Steam Deck

I'm not sure what you mean? The Steam Deck, and a TON of other controllers have analog triggers. Sony has been using them since the PS3. The GameCube used them, though Nintendo has gone back-and-forth on analog vs digital triggers. Every Xbox controller has had analog triggers. Most VR systems have analog triggers. It's hard to speak for an entire industry, but I think most 3rd party controllers have analog triggers unless they are soecifically intended to replace a Nintendo one that doesn't have it (like the JoyCons).

For the ADAPTIVE part... Yeah the Dualsense has it and nothing else does. I suppose where you and I disagree is in judging how important that is. To me, that was a fun little gimmick in Astro's Play Room and Ratchet & Clank, but I can't even remember any other games supporting it. Even in those games I thought it was a bit tiring on my fingers after prolonged periods of use. If we could knock $10 off the price of the Dualsense by removing it I would totally do that. It's also worth noting that 3rd parties like 8Bitdo have similar hair-trigger features that physically reduce the travel distance and turn them into digital inputs.

When it comes to all the other aspects- the material, the springs, the radius, the shape, the texture, the ability to customize in software - in my opinion the Deck is better than the Dualsense in all of those areas.

I don't mean to come across as hating on the Dualsense. It's a great controller and my 2nd favorite behind the Deck for most games. I actually bought a Dualsense for PC use more than a year before I bought my PS5. For triggers specifically,

For me personally, I would compare adaptive triggers to other gimmicks like analog face buttons, the light bar on the Dualshock 4 (which was ironically way better on PC than PlayStation), the built in speaker and microphone on the Dualshock 4 and Dualsense, the WiiU, the 3 prongs of the N64 controller, the VMU of the Dreamcast, the IR camera on the Right JoyCon, NFC readers, etc.

Somewhat related was that I did not mention haptics in my original comment. I'd say the Dualsense has the best haptics, but the Steam Deck is a close second. This is another feature where it's cool when the Dualsense uses it like in Astro's Playroom, but it's so rare for games to actually use it in interesting ways that it doesn't matter much. With the Deck, it's quintessential to how the track pads work, and the operating system itself makes great use of it. It can't do all of the spectacular haptic details, but the Deck has a nice subtle approach that makes the whole thing just feel more substantial. The Dualsense uses haptics for immersion while the Deck uses it more for feedback and feel.