I think 00s+ tech history has demonstrated that the free market is no longer sufficient to promote healthy competition.

Partly a consequence of the biggest tech firms getting bigger.

And partly because of newfound technical ability to achieve mass lock-in (e.g. vendor-controlled encryption, TPMs, vertical integration in platforms, first-party app stores, etc).

The 'but regulatory capture' counter argument rings hollow when the government has given the market a lighter monopoly regulatory touch... and we've ended up with a more concentrated, less competitive market than when it was more heavily regulated.