you are seriously twisting your argument to support your claim.  who knows the future?  to assume there will never be any innovation that gets added to a SC on top of a MC clone that won't make it more attractive to migrate to is asinine.  that's what SC are for!  and your security argument is a logical fallacy in that it is perfectly reasonable to expect that faster tx times will be achieved in the future that doesn't effect network security, point being SC's coupled with that innovation will obsolete Bitcoin.

and the whitepaper even acknowledges this migratory effect.  why won't you?