On 22/02/2020 23:41, Keith Lofstrom wrote:
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As a community of scientific, like-minded Linux users,
let's begin to prepare a rudimentary plan B, and hope
that we never need to implement it.

Well, the CentOS mail list is at https://lists.centos.org/mailman/listinfo/centos

I suspect that general purpose discussion of Linux customisation has moved away from mail lists to web forums.