Quoting Steve Litt (slitt@???):

> I would *never* consider GPLvAnything+, because I would never agree to
> anything I haven't yet seen. I have no way of knowing who will be in
> charge of the FSF in ten or twenty years, or from whom they will be
> taking money.

But you _do_ know that they're constrained by their corporate bylaws and
by tax law to adhere to their declared charitable purpose. I'd say, of
all the inconstancy in the world to worry about, that of FSF would
logically rank among the lowest.

Worrying about risks from 'or any later version' in this area is, IMO,
worrying about something so far-fetched as to be pretty funny. OTOH,
history shows that there are advantages to including that language, as
FSF has used that language to help fix problems as they arise. Example:
2008, when they helped Wikimedia Foundation move to CC-BY-SA 3.0 by
issuing carefully crafted GFDL 1.3 text to assist.
https://lwn.net/Articles/305892/
https://lwn.net/Articles/305898
https://lwn.net/Articles/334274/
http://www.fsf.org/news/fdl-1.3-pr.html

If Wikimedia Foundation hadn't used the 'or any later version' clause,
that would not have been possible.