As much as I adore my Asus laptop with Samsung OLED display and all content in real HDR, I have to agree. Not hitting the bare minimum "600 Nits" on a 2-in-1 (not just any but on high-end 1500€ model) is an instant deal breaker.
My iPad Pro 2017 model from 5 years ago had 600 Nits. At the time I switched over from Samsung Galaxy Tab because the Tab's screen was way too dim for my windowed office, buses, trains, outdoor cafes, you name it. Add to that, it's sunny all year long where I live so anything under 600 Nits just doesn't cut it.
Another thing to note is that Apple's universal "Anti-Reflective Glossy" finish is far better at countering sunlight than most "Anti-Glare Matte" coating used on windows laptops. Even at 500 Nits where most premium laptops are sitting at in 2022, cheaply made matte finish creates "light blooming effect" that makes it impossible to use a device outdoors.
Samsung did have it all figured out - their Q-LED displays on 2020 Galaxy Book laptops were 750 Nits, the best LCD at the time. They should have continued to sell and refine that technology for all 2-in-1 laptops.