The spam attack is worrying for me because BIP101 can do nothing about it as the Jan date is hard coded.
It's hard coded that way in XT, not BIP101 itself. BIP101 could be implemented in Core overnight. Or am I mistaken?
The Jan date can just be changed, it is just code.
The BIP101 can be added to the Core with just a different date.
Thats a good point! I suspect an immediate deployment of Core + BIP101 would then mean XT needs to also pull the date forward.
I doubt core is suddenly going to deploy BIP101 though any time soon! I'm not even sure if they could deploy a BIP100 solution - unless the devs reached a consensus on it? Which I guess includes Gavin still?
Perhaps that was the job of XT all along though, to help that consensus form....
... ok I'll get me tinfoil hat!