The software is abandoned (by me) even if it's not abandoned (by others). With open source stuff the distinction is often less important, but if I abandon one of my mods or bits of software, it doesn't really matter if someone else later picks it up and gives it a new lease of life, I've still abandoned it. While script extender devs and their ilk may be able to use wizardry to patch the code to some degree, it's hardly the same thing.
The people who can have moved on from it, therefore it's abandoned. I certainly wouldn't call the original Skyrim supported or maintained just because people are still modding it, it's not like they can claim any ownership, control, responsibility, liability, etc. We also wouldn't say TESV has been abandoned because there's a huge community of modders still working on it. TESV and SSE are different versions of the same game, and TESV is no longer being updated, but we don't say Skyrim has been abandoned.
