I use Bluebuild to create a reproducible system, plus a post-install script to handle other post-install tasks such as setting up initial preferences.
Also Vorta to backup files and settings to external HD, plus OneDrive Linux client to sync files and settings to cloud.
As someone who switched from Windows to Kinoite about 6 months ago (and now using bluebuild to create custom images), wether to use an atomic distro or not comes down to how much time do you want to spend learning everything.
I’m a very technical person with years of experience, and I’m still figuring a lot out. You’r not only learning about the ins and outs of linux, but now your adding more complexity with an atomic distro, and even more if you decided to create your own image.
Atomic distros are very much a work in progress and they do have issues you won’t find in non-atomic distros. Creating your image allows you to get around some issues you may run into that layering alone can’t do.
Also, keep in mind that version upgrades (which happen every 6 months or so on Fedora based atomic distros like Bazzite), can and do sometimes break apps baked into your image until they are updated (which also happens in non-atomic distros). Flatpaks can help avoid this breakage.
There are other distros that are gaming focused if atomic distros are not for you.
Check out blue-build.org where you can customize your image.