I wanted to know from OP why they're considering Manjaro.
Because it’s an excellent distribution which is also in the top of the Steam Survey (alongside Arch, Ubuntu, Mint and PopOS) (and Flatpak, and Steam Deck’s SteamOS).
I'd argue it's to Arch what Ubuntu is to Debian. Do with that whatever you will.
Btw, ProtonDB's numbers show that Manjaro is losing lots of ground over the years. I won't deny that the negativity around it plays a significant role in this. However, to me, if it's already installed on your device, your experience with it is simply more important than whatever's said about it. Therefore, I'd argue that Manjaro's ever decreasing market share has to be linked to users being ever so upset of its vision, direction and mishaps.
It’s a rolling distro but mitigates the risks of bleeding edge with a curated stable branch, offers LTS kernels going back to 4.19 but you can choose LTS or newer versions or RT patches, it does not force you to switch kernel version if you don’t want to, has visual management tools for packages, kernel management and driver installation, does a great job installing drivers during install, comes with extra safety features (update rollback built-in if you use BTRFS for root), Steam works great, you can use AUR and Flatpak etc.
All of that is cool and all, but trust is what it's all about. And honestly, I think someone should get a diagnose for Stockholm syndrome if they're still putting up with Manjaro after all it has done.