[2022] workshop for 7 nday to die

Mod support is already heavily implemented, the devs basically rewrote huge swathes of the game in a more mod friendly manner and implemented a system to enable modding without overwriting files.

And, Workshop support is planned. It's not that they won't add it at all, It's that they won't add it now. They don't want the workshop full of tens of thousands and more defunct and deprecated mods made for old versions of the game, So they're waiting for late beta stages or even release before implementing workshop.