I also agree that "Need" is too strong of a word, but they absolutely should. I am a huge fan of achievements and I use my switch less because of it

Someone above agreed they want one on Nintendo, I don't see the issue. However, I've changed the title to should, need is not the word I was looking for, yet I do want to imply that they would benefit from it in the question, cause they clearly would. Trophies move games on PS, that's a fact, Nintendo is in the business of selling games so an ecosystem where all the junk indie games actually sell with a system like trophies, even if it is for reasons you don't agree with is a good thing for them and the devs. Sony can't regulate trophies on PS now, if they did they would be working against themselves by getting rid of whales buying insta plats and ruining devs wholes business models. It's shit but we can ignore it and engage with the system casually, pick and choose and let the people who get obsessed to that degree run wild, they are enjoying it seemingly so why not. 

Fixes.

It depends on what the trophy lists goal is, I agree misc trophies that have you doing random shit for the sake of it are pretty boring but trophies that are checklists yet they are designed to get you to engage with a system in the game you might avoid are exceptional. I'm playing Like a Dragon Gaiden right now and if it wasn't for the platinum I'd have been done at 10 hours max but the platinum brought me to engage with this whole 16+ hours long, deep side system that weaves into different systems and in and out of the main quest line and the trophies make sure you engage with it in a way that doesn't devolve into some meta gameplay but to actually just play it as if you were playing the campaign and it was so much fun ranking up with side quests, then becoming a Fighter and grinding out a career in a cage fight arena while gathering a team of Fighters for group fights that are spread out through the game in all sorts of different side activities and a challenge too to overcome they didn't make it easy. I'd have written off that cause it was clearly a massive grind from the view at the start and I was overwhelmed but I persisted cause of the goal being there and I am so glad I did it cause it was the best part of the game. Same with Astrobot, best part of that game is finding all bots and doing all secret levels and returning to levels a second or third time knowing the mechanics and speed runinng them. Trophies can enhance games greatly, this year alone I have had five games that were greatly enhanced by going for the platinum, even made better than just doing the base game alone and extending the games hooks for longer or got me playing the game in a certain way with the platinum in mind, like with Robocop and saying yes to the side stuff instead of B lining things and taking it easy through the levels and enjoying myself.  

Robocop Rogue city

Alan Wake 2

Astrobot.

Black Myth Wukong. 

Like A Dragon Gaiden. 

Then there are platinums thst I followed that done every little and were boring, didn't enhance anything and I just grabbed them cause they were in very close reach after the base game like...

NoBody Wants to die

NERD survivors 

So it totally depends on the game and how they trophies are implemented and the intent behind what the devs intend you to do. Some people love game Platinums like FF Rebirth that have you play the game twice, 100% everything in hard and they take longer than the base game and some people love to buy platinums that pop in 1 secone once you boot the game, so I suppose it also depends on the person but for core gamers, if you assess the platinum before hand and see if it's what you want it's worth doing and if it turns out they have you doing silly shit like shooting an enemy after jumping while the sun is about to set on a Tuesday morning before breakfast without touching the controller then you can always give up. 

For third party games that are on other platforms, and pc it would be pretty easy to port over the achievements/trophies to the Switch 2.

To answer the start of the title Steam is easily best imo, never like trophies with arbitrary colors and the platinum ones literally just being grind out all the others most of the time. Just a simple achievement and a % of players that have it is perfect.

This.

They’re either participation trophies for completing the story, or they’re grindy bullshit. 

Nintendo are NOT the market leaders. When GTA6 launches, you'll see who the real market leader really is.

“Trophies move games” sounds so icky to me. Good games move games. I think a more immersive metaprogression would be fine. I always liked the idea in Metroid Prime 3 where the game you played showed up as stickers on Samus’s ship. 

I would rather have a dedicated app that shows an environment and that environment changes based on the games you play. Played Mario Wonder? You can now go interact with a wonder flower in a virtual world. Played Xenoblade X? Here’s a Skell to walk around in. 

Just curious what makes you think the system with the most sales/highest market share currently on the market isn’t the market leader?