>The French government did not provide a specific timeline for the switchover, or which distributions it was considering.
Do they realize they need to pick a LTS distro now? You can't mix and match distros without having a massive IT and user retraining budgets.
Why would you need any user retraining?
All distros are basically identical. The only real difference is whether you spell "package manager" as apt, yum, or dnf.
They likely don't. It's a purely political move not a technical move. With the average length of the French work week, this will take a while to implement anyway. Don't get me wrong, I think it's a great thought but I don't think it's more than a short-sighted reaction. Munich unfortunately faltered after a few years.
Just pick nixOS and provide base nixosConfiguration. tada.