Meta Platforms may shrink its workforce by up to 20% in a sign that artificial-intelligence productivity gains are finally materializing. According to a Reuters report from Friday, Meta has not finalized specific dates or details for cuts but is considering widespread reductions to its workforce. The company had nearly 79,000 employees as of its last annual filing. A Meta spokesperson told Reuters, “This is speculative reporting about theoretical approaches.” The company didn’t respond to a MarketWatch request for comment. But Wall Street seems encouraged that the company is thinking about paring back its staff. Shares are up 2.9% in Monday’s...