I switched from Windows 11 to Kubuntu a year ago, and then gave CachyOS a shot after hearing praise for it. I'm on a laptop with an AMD iGPU, and CachyOS's `znver4` optimized repos gave a significant bump on my Geekbench results:
(Note: these results are from almost a year ago though)
Lenovo Thinkpad P14s Gen4 AMD
- Windows 11: 2366 Single-Core Score, 10717 Multi-Core Score
- Kubuntu: 2496 Single-Core Score, 9878 Multi-Core Score
- CachyOS: 2569 Single-Core Score, 11563 Multi-Core Score
Repeat tests were essentially the same (Win11 23xx/107xx, Kubuntu 24xx/98xx, Cachy 25xx/115xx)
Have you observed any changes in your day-to-day usage, such as faster compilation times? If it's actually decently faster I might try it instead of playing with Gentoo to get better-optimized compilation flags.
I'd always recommend upstream distributions with corporate backing for novice users: Ubuntu or Fedora. If they're coming from Windows: Linux Mint. There's also a clear upgrade path for users who enjoy Mint or Ubuntu: Debian testing.
Arch Linux is awesome, don't get me wrong. I just believe it's borderline unethical to recommend someone installing anything related to Arch on their workstation. It's just not what a beginner should choose at all. CachyOS included, it even makes you choose your bootloader at install (any user-friendly distro would simply never bother you with that and go with GRUB right away).
A user's first distro can make or break their Linux experience. Think hard before recommending new users the flavor of the month or an Arch derivative.