As far as I can tell, the thesis of this article amounts to ‘cryonics is a weird idea, but what's even more weird is believing in the future.’ If you put aside the overt scorn, it's actually a fairly interesting article, and surprisingly upbeat at that.
I mean, CPR has gotten better for sure. But that's just for people who are mostly dead. Not going to work on people who are all-the-way-dead.
Anyone claiming high chances of resurrection in some sci-fi future are just blathing.