LWM's Deep Storage
LWM still has some health issues, a death in the modding community, and tiring responsibilities (related to being lucky enough to have solid housing!), so modding will be intermittent for a while. If you want to say something and don't want it to get lost, the github repository is a great place for that. I am also on Discord at LWM#7117 - but actually reaching me there may or may not happen. We do what we can! Enjoy the mod :)
If you use an add-on mod, most of them should work just fine in 1.4 (well, as fine as Deep Storage does - I'm still working out weight limits for 1.4, graphics, etc), no changes needed.
The only possible place mod authors might need to change anything for 1.4 is if they want 1-cell "shelves" to link with 2-cell (4-cell, whatever) "shelves." Given that vanilla shelves now support 3 items by default, you may want to rebalance things....and as a player, you can always do that in the Mod Settings for yourself. (I may play with vanilla shelves storing 2 items, for example - for 20 wood, less than a chair, it just seems more natural? But I'll only change that for myself in my own mod settings :) Or maybe I'll decide not to, who knows)
I will probably adjust either prices down or storage up by default on most items? I'm not sure yet. If you have firm thoughts, feel free to share them, altho I don't promise to listen ;)
Requires Harmony
DragSelect
This simple mod allows you to drag and select multiple items in trade, caravan, and transporter loading windows.
Camera+
You want more zoom and different paning? This little mod enhances the in-game camera so you can zoom in much more than usual. Perfect for this one great screenshot or for showing your viewers all the details while streaming.
Mad Skills
A collection of tweaks (found in Options -> Mod Settings -> Mad Skills) to change or turn off skill degradation and learning saturation.
Map Preview
Adds a map preview to the world map. It shows you the map that will generate if you settle on the currently selected world tile.