Gentlemen, just for context, I usually use Linux. I have been a user of Debian, Ubuntu, and Fedora for a few years.
Recently, I acquired a decent graphics card (GeForce RTX 4070) and decided to uninstall my Windows and install Linux.
I saw that Pop!_OS already has an image with everything pre-configured for Nvidia. Is this pre-configuration worth it, are the games more stable on this distribution, or is it the same as manually installing Nvidia's proprietary drivers on Manjaro?
Long time Fedora user here. I've used Manjaro for a few months before Fedora and I've switched to PopOS! a few months ago because it was better supported from my laptop manufacturer...
I've to admin I was a bit skeptical about switching to a Debian based distro, because I'm someone who likes to follow the latest news in the field and gets exited to try the latest stuff. But then I did and gosh if it's a smoother experience compared to Fedora! (which itself was a notable smoother experience compared to Manjaro). I'm not saying that Fedora experience was bad, I still think is one (if not the) best compromise between usability and freshness, but I'd say that with Pop I've had even less troubles than with windows! The price of that? Being stuck with Gnome 42 after having tried the goodies of newer ones :/
TL;DR: If you think you can live without the latest magic from the linux community, to then I'd reccommend you Pop. Otherwise Manjaro is a good distro and from what I can remember NVIDIA drivers works almost out-of-the-box but be ready for some frequent minor troubleshooting sessions
Use whatever suits your needs. But I do need to point out that there have been many problems with the community leadership of the maintainers of manjaro. And there are a lot of problems with their system overall. Bleeding edge rolling release stuff is pretty nice. I use it on my workstation and Debian on my servers. If you're wanting an actual arch-based rolling distro with Graphics drivers out of the box and great Steam support can I recommend Garuda. Specifically the non-dragonized Edition that is just eye bleed.
But I'm not going to Discount pop either. System 76 puts in a ton of work in hardware and in software. They're absolutely worth using and supporting.