[TUHS] Is there a good, even definitive, list of reimplementations of the Unix kernel? What would good cut-off criteria be?

[John R Levine via TUHS]

On Mon, 20 Apr 2026, Paul Winalski wrote:
>> I'd say the most successful microkernel system is Windows NT, if your
> measure of success is marketplace presence.

Oh, sure, but as usual ...

> Like macOS and many other microkernel-based OSes, a lot of stuff crept into
> the kernel for performance reasons.

microkernel => yet another macrokernel

QNX seems to be the only actual microkernel that works.

Regards,
John Levine, johnl at taugh.com, Taughannock Networks, Trumansburg NY
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