PS: makes me wonder if we might eventually see something like "tokens not transferred since ${some generous date horizon} will get blacklisted starting ${some era switch date reasonably far into the near future for living address to create a lifesign transcribe}" merged into mainline. Or even "get reissued to miners". If that ever happened it would be at a time when total supply uncertainty would already noticeably influence price (basically: if you use it as a value store you need to hedge against possible old god address revival), and most buying/selling during the runup would be bets about the amount of dark addresses lighting up in time.

PPS: obviously I have no idea about governance of the code, but I do acknowledge that very few changes have ever been accepted (as evidenced by the high number of long running forks). I wouldn't expect any of this to happen before the known alive amount of tokens has become a tiny fraction of the dark parts.