from the end-of-the-road? dept.
Ubuntu seems to be poising itself to letting 32-bitters alone in the dark:https://lists.ubuntu.com/archives/ubuntu-devel/2016-June/039420.html
in 2018, the question will come if we can effectively provide security support on i386.
cross-grading between i386->amd64 is not something we can reliably ship. We must continue [to] provide the i386 port, to support multiarch and 3rd party legacy application that are only available as i386 binaries.
Building i386 images is not "for free", it comes at the cost of utilizing our build farm, QA and validation time. Whilst we have scalable build-farms, i386 still requires all packages, autopackage tests, and ISOs to be revalidated across our infrastructure. As well as take up mirror space & bandwidth.
Thus the question is what can we and what should we do to limit i386 installations before they become unsupportable?
In essence this would mean April 2021 as the sunset for i386 as the host/base OS architecture. And April 2023 to run legacy i386applications with security support.