I’m curious, is there’s any issue with the original openstick repository being relatively untouched for 4 years now?
I notice that the links to the hardware in hackaday are broken but I imagine you could find this hardware somewhere.
Edit: I found the not-broken link in the blog that was linked in the hackaday article too if that helps anyone: https://extrowerk.com/2022-07-31/OpenStick.html
I haven't tried to compile the kernel myself but as far as I can see it's running a mainline 6.6 kernel, from 2024. I would not expect any issues when trying to update it to 7.3.
It might even be possible to replace the kernel in the image by the newest postmarketOS kernel to upgrade.