KDE Plasma is super smooth on it. 100% recommending it. All hardware, all modern everything works on my friend's laptop, even better than Fedora! It even recognized mouse brand etc., everything. and the laptop fans don't spin as much anymore, even turn off.
It's based on Arch so I can imagine Arch is really really good but maybe not worth the waste of time when Manjaro is already function nicely. Arch seems a bit of headache to get installed etc. but it's probably even faster with custom settings. 
I think anything else than KDE Plasma isn't realistic as desktop, it has a LOT of options that are needed for tweeking or whatnot but it's definitely not sluggy or anything, my friend's laptop is obviously very fast Intel 14700HX, 96GB RAM, Nvidia 4070 8GB, running Windows on this looked so cool but after I saw Manjaro on it, my God! You know, the entire OS took just roughly 10GB? BTRFS filesystem (I think with compression enabled), it's amazing, espcially seeing it on a 100-240Hz monitor.
Really hope my friend can do a set of posts on how to move to Linux from Windows, would be cool. I get it, there are lots of such posts online but I mean, they are kind'a not good. As an old timer Windows user, I know people like wouldn't want bullshit selling points, we want to see step by step and also visually see what is the results. There are lot of people screaming "move to Linux" but I think a good set of step by step instructions, would be greatly helpful for lazy asses like myself. Also, the move has to be realistic, running Steam and everything. Which in this case, Manjaro does excellently.
Just one issue, well, the Wayland thing, you kind'a have to have a monitor with 100Hz and above to get that buttery smooth mouse feeling of Windows but I don't think that's a problem, I mean for someone who has a PC and a bit gaming on it, it's not THAT expensive to buy such monitor, a 2K resolution is like $200-$300 these days, also, it's kind'a nuts sitting on a 60Hz these days anyway IMHO, they are like CRT now.
Of course, an OLED is NICER. HEHEHE... but that's luxury.

