Ethernet should always be the default choice when it's available, but that's not always the case. Sometimes, you don't want to go to the trouble of routing a LAN cable to your PC, and you don't have ...
The Raspberry Pi 5 is a single-board computer with a quad-core ARM Cortex-A76 processor, up to 8GB of RAM, and a PCIe interface that makes it possible to add SSDs, hard drives, AI accelerators, ...