> Should Apple's vertical integration be disallowed and broken up?
Personally I think there are specific use-cases that should be identified and banned in competition law - for instance the issue here (which could be legislated against) is when companies become a marketplace/platform that they 'sell' their own services on, which their competitors also need to use their services to effectively compete.
It's the dual role of being both a marketplace and a seller on that marketplace at the same time that produces conflicts of interest and market abuse potential. Examples (on top of the Google example):
* Apple vs Spotify - Apple could retain 100% of margin on their music subscription service, while Spotify their competitor had to give away 30% of their margin to Apple if purchased via App Store (which was mandated).
* Amazon vs Marketplace Sellers - Amazon encourages other retailers to sell on their platform, but secretly spies on their data to understand if they should directly compete and undercut them.
This isn't the only thing that requires specific legislation - and other parts I personally think should be better-legislated include:
* Use of one product to entrench another non-connected product's market position (e.g. Chrome -> Google Ads is an issue because the dominance of Browser means that they also get dominance of online search, because they can track better than the competition).
* Use of market-power to ensure people offer the lowest cost on your platform, despite fees (Booking.com, Valve, Amazon).