Except the marked did not do that on its own. The EU gave the industry an ultimatum in 2009: Adopt a common charger voluntarily or we'll regulate to force you

Except the marked did not do that on its own. The EU gave the industry an ultimatum in 2009: Adopt a common charger voluntarily or we'll regulate to force you to do so. Almost all manufacturers did, first with micro-USB before moving over to USB-C. Eventually, because Apple decided not to play well with others, they had to follow through and regulate.