Thank you for the review and suggestion. Can I ask you more about "making use of nested collections"? Is that something in addition to being able to assign the same number to multiple collections? Do you mean something like assigning a number to a collection would also trigger all of its sub-collections?
Perhaps it would be better to open an issue for this feature for further discussion, rather than trying to discuss stuff here.
Note: I can't promise any kind of time frame for this right now, but multi collection slots is something that I have tentatively planned to explore at some point.
Can't believe I haven't written a review of Collection Manager yet. I've been using this add-on since about 2019 or so. It's become such a part of my workflow that I forget it's an add-on.
It wasn't until I used it that I realized how cumbersome managing collections had been without it. What used to require careful forethought where I'd make a collection, name it, then select things to add to it is instead, a simple matter of popping up an easy-to-use menu where all the complex operations are now visualized in their own window, away from the complexity of the outliner.
Moving things from one collection to another, for example, is a button click. Selection and wrangling of assets suddenly becomes manageable because you can use Blender's collection system as it was intended.
I could go on, but just get it and use it and you'll be happy you did.
Oh, and I should say the developer of this add-on is extremely knowledgeable about Blender and is very responsive to feedback.
Though at first it may look busy and crowded compared to vanilla Blender's Move/Link to Collection menus, the GUI exposes much more things you can do with collections, and therefore I think does a better job not only to teach users what collections are and can do, but also makes power users' life easier because all you need is there in a single convenient place.
Love it and when it comes to managing collections, I cannot imagine working without it. Also like Jaye.Antoni_Whyldz, I'm kinda stuck as is broken in 4.4. Created a bug report: https://projects.blender.org/extensions/object_collection_manager/issues/2
staple addon for my workflow, however as of 4.4 it is completely broken and rendered unusable is there going to be any fixing of it in time for release?
Overall great addon, im just missing one feature for it to be perfect: multi qcd selections. Asigning the same number to multiple collections and making use of nested collections would make this addons super usefull.