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    SubjectRE: [PATCH 00/13] [RFC] Rust support
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    From: Thomas Schoebel-Theuer
    > Sent: 30 April 2021 07:40
    ...
    > Industry (where I am working) often requires a "second source" to avoid
    > the so-called "vendor lock-in", which is the key point of this part of
    > the discussion.

    There is also the related problem that you need to be able to come
    back in 5 years time and re-build the original image.
    You can then make minor changes, rebuild, and have a reasonable
    confidence that there are no side effects.

    This means that web-based and auto-updated tools cannot be used.
    Even a VM image might suddenly fall foul of changes to hypervisors.
    So you need to keep (at least) 2 system than contain all the build
    tools just in case you need to do a maintenance build of an old release.

    But even then we can no longer build drivers for some windows
    systems because we can't sign them with the old keys.

    David

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