Here's my feeling on disc-locked content: Say you buy a book. You take it home and read it, and it's a pretty good book! You enjoy it greatly! Except for when you get to chapter 16, it's locked. You can turn past it and get to chapter 17 just fine, and you still get the gist of the plot. You can still read to the end of the book. Attached to the locked chapter 16 is a little card that you can send off to the publisher along with $5 to get a key to unlock the chapter.
you just described serialized fiction. telltale follow this business model, capcom doesn't. sfxt is a complete game. there is extra content locked on the disc, yes, and this extra content may or may not have had extra resources allocated to creating which would later be recouped through the sale of dlc, but it is still a complete game. i don't think the two situations are analogous.
i also don't know how i feel about on-disc dlc. i get why it exists, and it maybe leaves a bad taste in my mouth, but i don't think this is as black-and-white as the internet is making it out to be. but hey, that's life - you're either with me, or you're wrong.
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ICON:
At school.