The VOIDRUNNER'S CODEX is LIVE! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
If I remember correctly, the last time they tried to do older issues as add-ons, it became a serious mess that took close to a year to resolve. So I guess that's why they are reluctant.