This spreadsheet of Pi style single board computers is pretty cool:

https://docs.google.com/spreadsheets/d/1jWMaK-26EEAKMhmp6SLhjScWW2WKH4eKD-93hjpmm_s/edit#gid=0

found via https://blog.erratasec.com/2019/05/some-raspberry-pi-compatible-computers.html

There are so many alternatives, but ease of access, support and hardware variety make the Pi an good choice.

I’m also really tempted to add an SSD to my Pi 4, after seeing https://jamesachambers.com/raspberry-pi-4-usb-boot-config-guide-for-ssd-flash-drives/