Apple Inc., Alphabet Inc.’s Google and Meta Platforms Inc. were this week all hit by investigations under the European Union’s landmark new Digital Markets Act — plunging the future for some of their key services into uncertainty and running the risk of multi-billion dollar fines.The DMA aims to nip potential abuses of monopoly power in the bud rather than traditional antitrust law, criticized for punishing firms often many years after they have crushed competitors. The European Commission, the ...