[tchalla]

Let’s assume that it wouldn’t impact Facebook’s tracking ability. If so, there’s nothing to worry for Facebook. It’s surprising that Facebook is engaging in a PR war with Apple for something that doesn’t impact their core business.

[abtom]

You could say it is cutting off the most accurate and cost efficient method for Facebook to track iOS users. A dozen other tracking methods still exist but they might be slightly worse in terms of cost/accuracy. Definitely something to cry about.

[tchalla]

So, it DOES have an impact on Facebook's tracking ability.