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There are over 1900 titles out there.
Matching the titles existing would net about ~680k chaos packs burned.
There are ~2.76m packs out there so that's about 24.6% of packs.

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(this does not include scorcher, burninator titles)

Perhaps you're referencing total packs that were printed which as we know was excessive but even still roughly 4.5% of all total that have ever been in existence.

I submit 680k packs is a HUGE deal. I doubt we would burn that many but would be an amazing dream. That's 3.4 million cards!!