Reuters article: https://www.reuters.com/business/aerospace-defense/airbus-others-call-sovereign-infrastructure-fund-buy-european-2025-03-17/
This person seems to have published a copy of the letter, but there are no official sources:
https://berthub.eu/articles/EuroStack_Initiative_Letter_14_March.pdf
I’m running nixos unstable. I did get some panics while hibernating with one kernel version, but otherwise it’s been super stable.
Enabling threadedirqs (real-time feature) on the kernel command line does make the kernel panic on boot though.