This is exactly what is keeping me from endorsing Capacities.

Grouping is a MUST to keep visual overview.

how is this basic feature not a thing yet... all objects under a tag are automatically grouped by object type in gallery view, i simply want to group them by tags instead of object type. If you're not going to let me group them how i want, then don't group them at all!

The wall view avoids the automatic grouping but still wont let you group them by tag or property, only sorting, so the transition between sorted properties is inline with the previous, making it hard to identify where each tag starts and ends.

Example of "Group by" implementation in Craft's Objects, definately would love to see this in Capacities

Agreed on this. For example, I would love to take advantage of the "Dashboard" and "All" views that comes with each object, and then have the list of everything be able to be grouped by a property, thus having Sort, Filter, and Group options for arranging the items.

An example use-case would be for a simple Read/Consume Later list, where you could have the content grouped into different categories such as "Book" "Article" "Video" "Podcast" etc. etc.

Additionally, this would also work well for a simple To-Do list, where you could use a Filter for {<task name> is not "Completed"}, to filter out all of the completed tasks from the entire list, and then have a section grouped for "Completed" tasks, to allow all of the completed tasks to show in a separate section below.

(...as they would otherwise be filtered out from the main list and not visible in that view).

Also, as others mentioned, this would be an essential part of a task-manager as well, as it would allow a task list/kanban board to have groups for various statuses/progress points of a task, etc.

It's definitely an essential in my mind, so it would be great to see! I would go as far as to say that I wouldn't continue using Capacities if it wasn't in the pipeline for the near future.

I want this too. Definitely.

It is very necessary, since there is a lot of information it is difficult to appreciate it if it is not classified into subgroups.

Agreed, separating tags depending on the collection they belong to would make it easier to navigate the "tags" objects. You can't sort or filter by collection anywhere but especially for tags it would be a great addition. A way around it now is to color the tags the same or use the same icon to filter out just the ones related to what you're looking for, but it would be even better to have that separation by category/ collection while browsing them all.

Example: for books I may have 20 tags for various genres. For stock trades I may have a bunch of tags giving me context (watchlist, portfolio, dividend, growth, turnaround, etc.).

This could be a good basis for task management, allow group bytagand easily move from one tag to another