Devuan just released their LTS stable Jessie system:
Devuan GNU+Linux is a fork of Debian without systemd. The latest 1.0.0 Jessie release (LTS) marks an important milestone towards the sustainability and the continuation of Devuan as a universal base distribution. Since the Exodus declaration in 2014, infrastructure has been put in place to support Devuan's mission to offer users control over their system. Devuan Jessie provides continuity as a safe upgrade path from Debian 7 (Wheezy) and a flawless switch from Debian 8 (Jessie) that ensures the right to Init Freedom and avoids entanglement.
And if getting it has to be a secret, check out http://devuanzuwu3xoqwp.onion
-- hendrik
[See also the Devuan 1.0.0 stable release (LTS) announcement for more information on how to install/upgrade, the support services that are available (bug tracking/reporting, user forums, etc.) --martyb]
(Score: 3, Interesting) by fritsd on Friday May 26 2017, @05:25PM
Devuan Jessie is basically a clone of Debian Jessie. You can upgrade from Debian Wheezy.
I don't know what you mean by "ancient software". MVS/TSO? VM/CMS?
If by "ancient software" you mean "software from before 2016", then yes, it is full to the brim of that :-)