I am working in the Red Hat "Python-maint" team which is maintaining Python 3.6 as the main Python interpreter in RHEL 8, which will likely be supported for at least 10 years. And we have been supporting Python 2.7 in RHEL 7. So obviously, being able to benefit of the upstream effort and infra to have a Python 3.6 Long Time Support (LTS) would help us :-)
The question is more who else would benefit from that and is it worth it? I don't want Python upstream to pay the price of the maintenance burden of RHEL 8 lifecycle. For example, supporting a version means to have a working CI (Travis CI, AppVeyor, VSTS, buildbots). I would suggest to only support a very few platforms for the LTS. I propose to restrict to Linux. It doesn't mean to break other platforms on purpose, just to restrict CI to the bare minimum. If Microsoft is interested, we can also support Windows as well.
RHEL 7 is based on Python 2.7.5 which has been released in 2013 (5 years ago) and there are 150 patches on top of it: it means that around 30 patches are added per year. I would suggest to have a very strict policy on which changes are backported into 3.6: only the most critical bugfixes, but all security fixes obviously.
If we extend Python 3.6 lifetime, do we need a new release manager when the initial lifetime (usually 5 years) ends? Benjamin Peterson accepted to be the Python 2.7 release manager for 10 years (instead of 5 years initially). We could ask Ned Deily about Python 3.6 LTS :-) We would need a group of people reviewing individual 3.6 pull requests to decide to pick them or not. I would volunteer to review these PRs and merge them.
The idea isn't new, Nick Coghlan proposed a "ELPython" last year:
The Linux kernel also have multiple LTS kernel which are supported longer than usual releases: they are now supported for 6 years. See "Longterm" at:
Night gathers, and now my watch begins. It shall not end until my death.