There's no shortage of operating systems you can try on a Raspberry Pi. These include general-purpose distros like Ubuntu and Fedora that are ideal for desktop and server use, as well as more niche ...
Running Android apps on my Raspberry Pi used to be a niche curiosity, but with Waydroid, it has become a genuinely useful feature of my home setup. I've got it running on Raspberry Pi OS with Wayland ...
A Raspberry Pi multiboot lets you pick Raspberry Pi OS, Ubuntu, or MX Linux at startup without changing SD cards.