Myth
Scalia was vehemently opposed to the Article V convention at the end of his life.
I certainly would not want a constitutional convention. I mean, whoa! Who knows what would come of that?
- Antonin Scalia interviewed with Bernard Kalb, 2014
Fact
Scalia's remarks don't conclude with the quote above. He had more to say on the subject. And what he had to say undermines the claim that he had changed his mind about the convention process.
The rest of the story...
Here's how Scalia concluded his remarks...
If there were a targeted amendment, ... I think the only provision I would amend is the amendment provision ...I figured out at one time what percentage of the populace could prevent an amendment to the Constitution and if you take a bare majority in the smallest states, by population, I think something less than 2% of the people can prevent a constitutional amendment ...It ought to be hard but it shouldn't be that hard.
source: at 1:06:09
2015 Remarks
A constitutional convention is a horrible idea. This is not a good century to write a constitution.
- Antonin Scalia to the Federalist Society, 2015
Write vs Amend
The use of the word "write" and not "amend" is significant. Scalia is not lazy with his word choice. He's clearly saying this is not a good century to write a new constitution from scratch.
He isn't talking about the Article V convention in either of these remarks.