While this is "technically" a "Linux computer", in practice with such a small amount RAM the name is a stretch.
My first linux computer was a 33Mhz i386. I can't remember the amount of RAM, but it must have been 2MB or maybe 4MB.
This thing has 64MByte of RAM, after login, 44MB of it is free.
- processing data from a marine radar (it streams individual A-scopes as UDP stream), aggregating the sweeps into a .png image, denoising and uploading and handling some related logic (antenna tilt, gain settings)
- weather station pulling in data via serial/GPIO/... and publishing them as a webserver (lighttpd) and uploading them via OpenVPN to a cloud storage; firmware in the sensors can be easily updated and debugged remotely because the system runs avrdude and openocd
- emergency serial console - connected via USB to serial adapter to server, and you can SSH into it (again through OpenVPN/Wireguard), open a serial terminal or power-cycle the machine
- LoRaWAN gateway
And the best thing is that all this was written in Python! (with occasional C functions where native performance is required) So you have all the comfort of a high-level language and a full comfort of a standard Linux stack (though a bit limited because it is Busybox).