If i am not wrong. Believe i remember u say this is not in use anymore ?

0.17 and some 0.18 mods are still requiring this library.
Deprecating would make it unavailable for automatic download to those mods.

This mod is now marked as deprecated. Is there any specific concern regarding older savegames that might have flagged this mod as required? Or is it a matter of relying on any other existing mods (looking at LTN primarily) already have, if updated properly, all the info they need built right in?

Having read your post 3 times I still have no idea what you are asking.
My personal library has been completely replaced by FLib in all my mods months ago.
I do not support old versions of my mods.

That addresses my question, thank you. Sorry for the word salad, I was asking "hey I've used LTN for a long time, but I'm coming back to the game for the first time since the new year, and all of a sudden my mod panel is telling me that this is a conflict and your lib was only compatible with v0.18, but I've been playing on 1.x at least since Halloween so I can definitely tell you that the mod has worked since then and I'm not sure why I'm just noticing this conflict now."

Honestly, it's nbd, you answered my question. Thank you.