(yes I know it isn’t technically a thinkpad but let me have my stupid gay puns)
Use it as an excuse to wear the programming socks
Install a gameboy emulator and play pokemon on public transport with the volume up high
Use it to run arch!
When I used arch (btw) the only thing I did was using arch. Configuring vim, the tiling wm, editing scripts to automate configuring arch. It was all circular. Arch is the best system for the task of configuring arch, tbh.
Spend 4 days configging it and then close it.
Seriously though you could throw Wireshark on it and learn about your network.
Install gentoo for the performance benefits*
*(Degrees of performance increase can vary no guarantees, any performance gained will be spent again preventing library conflicts updating the kernel and generally crying because compiling takes years)
Collaborating with revolutionaries to tear down capitalism and establish fully automated luxury gay space communism
Restructure global economic systems.
Use it as a server with built in backup battery for running P2P stuff.
I have a similar setup for using syncthing (P2P file synchronization) that allowed me to get rid of centralized cloud stuff.
Lots of options tho, you can run a non-exit tor node (thats the safe kind that wont attract cops to your door), torrenting stuff (be safe duh), etc
Porn NAS
You could play a game of Global Thermonuclear War
Games and stuff
Write your manifestos
Install void Linux and i3wm, then exercise your signature look of superiority on arch Linux plebs.
Not using systemd is just setting yourself up for failure later
To be fair, I ran gentoo with openrc for 3 years and it was mostly fine. Init systems don’t matter that much.
What would be funny is to have the musl void run on OP’s beast.
Coding web-based erotic visual novels starring anthropomorphized music genres
I use my old device for anime torrenting but sadly most mkv vids dont run on it:(
Which is a significant portion of them nowadays