Welcome to Critical Mass, Law.com's new briefing on class actions and mass torts. I'm Amanda Bronstad in Los Angeles. Happy New Year! Today's Critical Mass kicks off with dozens of class actions brought over Apple's admission that it slowed processor speeds of some older iPhones. Also, the “dream team” that formed to lead the opioid MDL is anticipated to adjust its proposed membership a bit on Wednesday. And find out why lawyers who got a nearly $28 million verdict over Xarelto last month are apologizing to a Philadelphia judge.

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