Many of Apple's products could be attacked by smaller companies, if it weren't for their anti-competitive practices. For example, AirPods get exclusive and superior APIs on iPhones - it doesn't matter if you make a better or cheaper AirPod competitor because you are stuck with clunky Bluetooth pairing. No non-Safari web renderers. Can't backup or transfer files to your iPhone without another Apple product. iMessage, the Music app. 30% fees and no sideloading. The list goes on and on.
To think that Microsoft almost got broken up because of bundling IE with Windows.