I recently did a project with a pair of RPi 3b+ and cellular modems as construction cameras.
I set up RetroPie on a 3b+, but it wasn't enough for the N64 games my wife and I wanted to play the 4 could change that
Currently my security cameras are recorded using Orchid VMS on an Odroid XU4 ( Cloudshell with 2x 4T SATA)
Its a great little tool for learning Bash, and groking your systems - testing portability? - without invoking AWS resources.