Matte panels have long been out of the market. I haven't seen them for over 15 years. All panels that are now called "matte" are actually semi-matt. This was done intentionally many years ago to eliminate the crystalline sparking effect of a too strongly diffusely etched surface in really matte screens. Because of what people had strong complaints about it. This is a compromise solution. The panels glare, but not as much as glossy ones, without tiring the eyes when the head is slightly tilted in front of the screen and at the same time without screen sparking due to the crystalline effect with strong etching to really suppress almost all glare.
Now it is impossible to meet a really matte screen in laptops, I have not seen such on the market for a long time.
Therefore, the minimum brightness on the street should be from 1000 nits or more for semi-matte screens, and for glossy screens above 2000 nits. But this drastically reduces the autonomy of the solution, although with the current consumption of processors and video cards, screen consumption is negligible even from 2000 nits. It's just that manufacturers do not have real technologies to ensure mass production of cheap and high-quality, with a long resource in hours (at least 15k hours), panels from 1000 nits.
By the way, no one pays attention, but Lenovo's new IPS 3.2k panels (for example, in the new Thinkbook 16p 2023) have a resource of only 10k hours, instead of the usual 15k earlier, and a temperature of no more than 50C. At the same time, they have poor vertical viewing angles - 170, not 178 degrees, in contrast to the variant with 2.5k.