Why now, and why so many people? Those were the two questions whipping around the business world following Block’s shocking announcement that it was slashing 4,000 jobs, or nearly half its workforce.

Block, Jack Dorsey's payments company, will cut 4,000 of its 10,000 workers as it embraces AI. CNBC's Steve Sedgwick says it's "time we got better answers" to questions about what jobs the technology ...