Don't need to imagine, it did not take off, https://en.wikipedia.org/wiki/MkLinux
> Reception was mixed, focusing on the difficult installation process and the significant performance costs of the Mach kernel. Reviewers noted its potential as a "Unix killer", but that it required users to abandon the user-friendly Macintosh experience for a pure Linux environment.
> difficult installation process and the significant performance costs
So it was a failure in implementation.
1996 is not now. This comparision makes little to no sense.
I'm sure if Apple provided support for installing your own OS on their M series laptops it would be incredibly popular. And I don't need to guess at this using weird 1996 research on microkernels because Asahi Linux exists and clearly there is interest in it.