I don't either.  I've been remiss in studying alts because there are just so fucking many of them.

My strong sense is that NONE of them are really biting off the problems that are important to me.  Everyone seems to be happy to nestle in the gentle bosom of big brother to offer protection of freedom on the global internet.  The concept that restrictions on paths, protocols, etc might be possible seems to be rejected out of hand as a wild conspiracy and not worth designing around...even as Obama and Camaroon agree that their boys should not be locked out of one's cell phone.  It boggles the mind...then I remember how tedious and difficult it is to design systems around fewer resources than currently exist.  No fun at all (though I always enjoyed it but I'm an odd-ball) and not the best way to suck in VC money or impress adolescent marks in the ecosystem.

I'm sure that interests would shift rapidly upon attack...though maybe not rapidly enough if the attack is done correctly (that is, in a boiling frog approach.)