For instance, you can run two copies of the Hurd at the same time, debug the new one using the old one, even gradually switch from one version to another. The Hurd offers the power of a microkernel-and-servers architecture. Free operating systems based on other kernels are now widely used what will Hurd-based systems offer that will make them attractive relative to the others? The GNU Project's kernel now, of course, is the Hurd it is evidently getting close to ready for more widespread distribution. One factot was that it ran only on an obscure machine, and would have required porting before we could even try to develop it further. I think that I eventually concluded it was not really usable as a starting point. It was called TRIX, and was developed by someone at MIT (I don't remember who). The GNU manifesto states "An initial kernel exists but many more features are needed to emulate Unix." What was that kernel, and what happened to it?
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