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 ...
Without a doubt, Raspberry Pi 4 has a capable processor. It has a Broadcom BCM2711 processor with four Cortex-A72 cores, which are capable of clocking much higher than 1.5 GHz, which you get out of ...