[jtheory]

What's your reasoning here, actually?

There are still fairly few expats who go to the trouble to renounce their citizenship... so "good riddance" to them?

It's perhaps worth pointing out that these are people who've already left, some of them decades earlier, who hung onto their US citizenship possibly because it's been easier than the alternatives (I can tell you getting citizenship in, e.g., France, is non-trivial, particularly if you're not married to a citizen, but even so if you are).

But now, for this little slice of expats, keeping US citizenship has become the more onerous option, and so they have a pragmatic reason to drop their old citizenship in a country they no longer inhabit, anyway. What's to get worked up about, really?