The biggest drawback is that you have to rely that the manufacturer is ethical and isn't loading your shit with bloatware/spyware, which, lol. I suppose one benefit is that, theoretically, they can spend more time and resources on designing a laptop instead of licenses for windows, but I remember reading somewhere that Microsoft eats up market share by providing their OS for free for PC manufacturers. Is that still true?

I'm not currently looking for one, but I am curious about them. For my use case, it would be mostly light programming, web browsing, movies and videos, photo editing, and light gaming. Doesn't make sense for me to shell out $1000 for some spyware linux junk when I could just buy some used 2015 windows laptop and install a distro on it