P: Ability to sync Lightroom Classic keywords with the Lightroom Ecosystem

"but to be sure keywording will not be use for users to exit the adobe ecosystem."
--> so it is by design, no?

Or Adobe could simply keep the hierarchy by internally storing something like "City>Los Angeles".

You are able to export and import hierarchical keyword lists to files using LR CC with no issues but they say they are unable to do something similar via the internet?

Interesting reasoning...

Obviously I'm sure it is not limited by design (as declared) but to be sure keywording will not be use for users to exit the adobe ecosystem.
What I mean adobe is turning LR from desktop to full cloud. As a result they will justify the price because of cloud cost and not because of functionality.

And without full keyword management (which is a total open management system usable by every software or the finder/explorer) we will not be able to switch to an another system/ecosystem

So they will ensure a permanent revenue.

I don't know darktable, maybe I will have to give a try.
Or maybe the file management of Luminar? 

But actually LR CC is near unusable to manage / catalog photos but develop photos

To be honest, the only thing that keeps me with LR right now are:
1) Too lazy struggle with a switch to another platform (darktable looks fabulous, though!)
2) Sync between LR mobile and desktop

Number one can easily be solved. And If the next versions of LR is not a big improvement (speed, functions, sync, ...) my laziness will decrease quite quickly. Number two could also easily be solved

I agree. But this could be the "one too much" mischief from Adobe against customers ans push them to go and watch elsewhere. Darktable ?...

Of course! Stating it's a technical issue is taking people for idiots. Insulting! How to do it best? I don't know, it's not my business. But I do know it is not technically impossible or even that difficult.

The sad part is, it is a political / marketing / business / ... decision.

The even sadder part is: LR classic is probably going to die slowly to force people to switch to a full cloud based app.

What I read here is crazy after 11 months! I think it should be easy to flatten the hierarchy to allow sync
I should be easy for every developer, no?

For example
"master keyword" and "sub keyword" become "master keyword.sub keyword"

For example _ 
Landscape/mountain
Landscape/river
Lanscape/forest in Classic become 3 flatten keyword in CC during sync :
Landscape.mountain
Landscape.river
Lanscape.forest

Resulting in a full flaten syncable keywording.
So Adobe will not need to implement so much functionality in CC and we will live with the 2 software to composate CC desktop wekness
No?

I agree that it's a huge omission, and I want to see it rectified, but while they look like strings in the UI, I believe the internal implementation is much more complex (in order to support hierarchies and global keyword renaming, etc.).

I investigated writing a plugin that would sync keywords from LR CC back to LR Classic. Unfortunately, the Creative SDK (Software Development Kit) provides access to all the other metadata fields -- title, caption, capture date, flag, and rating -- but, inexplicably, not keywords!  

If it provided access to keywords, it would be straightforward to implement a plugin that synced from CC to Classic, handling the mapping from flat back to hierarchical keywords nearly seamlessly.  Adding keywords to the Creative SDK would only take a few hours on the part of Adobe engineering.  So please add your vote and constructive opinion to this bug report: 
https://feedback.photoshop.com/photoshop_family/topics/creative-sdk-provide-access-to-lightroom-cc-k...

There is clearly logic to flatten keywords at initial load to Lightroom CC, so if that is acceptable to those who have converted it should be acceptable to use that same logic ongoing (after the initial load).