Switch from Intel to their own ARM CPUs will hit the Hackintosh community really hard.

With the T2 chip which is already present in other Macs. It’s optional at the moment but I assume at some point it will be closed off. And then there’s the ARM CPU argument - we could get those soon.

New Macintoshes come with an Apple-produced "security chip", which is an ARM like those found in iPhones and iPads. They communicate with the main CPU and provide it the boot code via SPI for security, but the security chip itself has an entirely cryptographically signed boot chain and will only boot Apple-provided code.

The presumption is that when enough time has passed that Apple will obsolete the non-security-chip-equipped macs and macOS will only boot when able to communicate with a security chip running Apple-signed code. It's quite plausible. The security chip does provide a ton of other benefits, though.