Arch Linux with the yay helper.

Just typing `yay app-software-name` and hitting enter a few times to install any app, no matter how obscure, or proprietary it is (at least for me 99% of software I use is included in the arch packages or the AUR). Unfortunately the installation procedure for Arch is quite daunting at first, but the Arch wiki helps a lot and you can use Manjaro which is presumably user-friendly.