P: Want to change Layer Comps inside a Smart Objects

[FeedbackCommunityMember]

I'm a Web Designer and I would like to combine Smart Objects and Layer Comps in my daily workflow more effectively. I would like to select which Layer Comp inside a Smart Object I want to display on the Root Document where it is placed and also store that again in a Layer Comp of the Root Document.

This could allow for example to store the Menu of a Website in one Smart Object but call different active states of this Menu from the Main PSD.

[thibaudv42547040]

for what it's worth, an alternate and more convenient workflow for what you describe is to rely on artboards rather than layercomps in the master psd.
page components (header, footer, etc...) as smart object are very useful, but you have to lay out pages states with artboards (thus copying the smart object) if you want to solve the current smart object limitation

[Mattias_Bregnballe]

This is also what I have found to be the easiest workflow at the moment. 
Artboards containing smartobject that may contain layer comps for different states.  
Other than that, I am looking forward to seeing what Adobe XD can bring to the table. 

[vinnylepes]

I have tried this approach, but there are a couple problems with it in my experience. One is simple but annoying; it's difficult to navigate documents with many artboards. I know it's a small thing but it slows you down. The bigger issue I run into is performance. At my job it isn't unheard of to be doing anywhere from 7 to 20+ pages of an application or site in 2-3 screen sizes. Photoshop handles the large documents well when not all layers are on at once, but as artboards stack up it gets slower and slower. Artboards are also still a bit buggy, although they are consistently improving, which is a good sign.

[thibaudv42547040]

if the numbers of artboards make it difficult to navigate you can try using ctrl click on the artboard in the layer panel to navigate.
as for the performance issues, I suspect, you may be an osx user.
I'm sorry to say that the windows version performs just waaay better in that regard in my experience
also for the most part in my workflow all artboards in a psd share the same smartobjects (often linked) I believe displaying 10 states (via smartobject layercomps) of 10 different smart objects should have a far lesser impact on performance than displaying 100 different text object for exemple)
my intuition is that smartobject as being black boxes should perform better than other (in place editable) element 

[FeedbackCommunityMember]

+1  The feature is  pretty  useless till we could save smart objects  comps within parent file layer comps and switch them instantly .    Now I have to do 10 copies of a smart object to represent it's different states.It turns layer stack into an utter mess

Another problem:  re-saving and updating  hi res 16/32  bit smart objects takes forever .   I love how Affinity Photo updates master file instantly once you do something in embedded doc .   Would like to see same in Photoshop.   As an option maybe.     

[PECourtejoie]

Hi wasn't this implemented end of 2019? See: https://jkost.com/blog/2019/11/adobe-announces-updates-and-new-features-for-photoshop.html