What is Block, Jack Dorsey’s firm that laid off 4,000 people due to AI? | Block’s shares surged after layoffs | Inshorts  InshortsBlock lays off 4,000 workers citing AI. But how much does AI actually have to do with it?  CBCCould Block’s AI-fueled layoffs be a ‘tipping point’ for white-collar jobs?  Global NewsJack Dorsey to cut 4,000 jobs due to AI advances at Square parent Block  The GuardianBlock shares soar as much as 24% as company slashes workforce by nearly half  CNBC