The App store fees are pretty atrocious but I fail to see how Apple Silicon is anything but a net positive for the industry.

So Apple brought competitiveness to an industry that was badly needing it and stalling in the most recent years.. and your “solution” is that we should prevent them from doing so?

It's a strawman. Apple has the capacity to do immense good, but only because they're the single largest company in the world! We should scrutinize concentration of power heavily, and so far Apple has done nothing to suggest their benevolence to the rest of the market. They're blowing off Dutch regulators like it's a middle school homework assignment, and refusing to loose their asinine monopoly over software distribution on iPhone. They're behaving childishly, and everyone knows they're not a child. They're a company with hundreds of billions of dollars, and they're demonstrating organizational failure to address the demand of the market. On top of that, they're largest revenue sources are rent-collection and unibody aluminum computers made by political prisoners in Chinese concentration camps.

They need a slap, hard.

No comment on the other stuff, but the “silicon” part of this argument boils down to “anyone who makes something way better than the competition must be shut down because that’s unfair”.

We’d still be in the Stone Age if everybody had that mentality

Apple successfully monopolized the 5nm node by buying out all of TSMC's manufacturing capability at that node size. Characterizing it as "anyone who makes something way better than the competition" is a strawman portrayal of the underlying issue at hand.

Apple contributes billions of dollars to TSMC’s R&D. The node would not exist yet without Apple.

What, exactly, are they "doing to silicon"?

They made a chip that's vastly better than anything out there at a given power consumption level. They are not attempting to use this advantage to corner the silicon market; indeed, they are neither licensing the design, nor selling the chips outside their own end-user hardware.

How does any of that say "antitrust" to you?

Using their enormous lead on cellphones and their incredible negotiation power and playing that into mobile business computing and supply chain / process monopoly.

The same goes for Google. They have higher market share in many categories and cover many more of them. Near-monopoly on search, ads, online video, email, and at least half of the smartphone OS market...

Each of the trillion dollar tech companies could be split in half and still be trillion dollar tech companies.

It would be a healthier ecosystem for startups and competitors and make for faster total sector growth.