I wouldn't mind throwing together an official archive of old releases and some of our original testing ISOs. I would need to talk to @DataDrake about where to store those.
I have a few extra random ones I can toss up as well:
- Solus-1.0-Alpha.iso
- Solus-1.2-Alpha.iso
- Solus-FDE-Validation.iso (either first validation ISO for full disk encryption testing or one built against unstable for cbm testing)
- Solus-GNOME-Validation.iso (first validation iso for Solus GNOME Edition before its first release in 2017.04.18.0)
- Solus-MATE-Validation.iso (first validation iso for Solus MATE Edition before its first release in 1.2.1)
- Solus-Plasma-But-Like-Slightly-Less-Broken.iso (from Feb. 2018, dunno what the context was aside from the obvious "less broken")
- Solus-Q1-CBM-Validation.iso (original clr-boot-manager testing ISO)
- Solus-RC1.iso (first release candidate ISO for Solus 1)
I might have some more on my old harddrive in the closet that has EvolveOS on it as well. Most of the above ISOs probably aren't going to work in something like GNOME Boxes but if you got an old rig laying around there's little reason they shouldn't boot (depending on varying kernels, hardware support, etc.).