The SDK is different from the platform itself, but more or less. So I have three versions of Gnome, two of KDE, and three of Freedesktop.org, just based on the apps I run on Silverblue and what version they're at in Flathub. Since I asked specifically about SSL, that's shipped with FDO, meaning I potentially have three versions running right now. Also I have this annoying situation where an app a client uses is using a deprecated FDo runtime and nobody wants to pay to rebuild it.