I’m not going to respond with a lot of depth because I don’t think I have a good enough understanding here to be particularly helpful, but I suspect a collar would be considered as inappropriate in a school because of its strong association with BDSM practices alongside the general societal expectation that one’s sexuality is kept out of the public eye. I think that notion can also apply more broadly to the situation as a whole, at least to an outside observer.

This generally isn’t true. The SSA makes an effort to assign a unique number to each individual. It’s happened before where two people have accidentally gotten the same SSN, but they try to avoid this.

I’m not familiar with the specific install/upgrade process on Gentoo so maybe I’m missing something, but what’s wrong with forcing new installations to use time64 and then forcing existing installs to do some kind of offline migration from a live disk a decade or so down the line? I feel like it’s probably somewhat uncommon for an installation of any distro to be used continuously for that amount of time (at least in a desktop context), and if anyone could be expected to be able to handle a manual intervention like this, it’s long-time Gentoo users.

The bonus of this would be that it wouldn’t be necessary to introduce a new lib* folder - the entire system either uses time64 or it doesn’t. Maybe this still wouldn’t be possible though depending on how source packages are distributed; like I said I dont really know Gentoo.