Not what I would expect. Maybe I am wrong but I dont recall ever seeing a UI where you can do this sort of thing

When I am in PHP Storm and create a new directory I can just type parent/child and it creates the parent folder and the child at once.

I think that this is common behavior when there is on-the-fly creation of items which can be nested. I've seen it in quite a few places, mostly filesystem related.

However, this could have unexpected consequences for people who are using tags that have the / as a part of the text, not an indication of nesting. Like "Bikes/bicycles".

If we were to add it, auto-nested tags would have to be an opt-in behavior in my opinion, because it's specific to the mental model of developers or more systems-minded users. :) Would you agree?

Should also note that nested * is not always displayed the same way

oh, boy. Good point Brian, that's an issue in and of itself. ?

I only posted a few examples

Feel free to post a whole new issue about it and tag me.

If this is to be implemented as a new feature then it will need to be consistently applied throughout joomla

I would love to see here rather more consistency and fix the appearance of the nesting. That would remove the confusion that I could do something like parent/child as well. Could someone remove the new feature tag and add a UX tag instead?

You need to be very careful here. Whatever you display has to make sense when you are filtering the results

But that's the same issue for categories or not?

You are actually supposed to be able to switch between "ajax" and "nested" mode. This is indeed another inconsistency in the tags component. I would like to introduce an option to limit tags only to one level, which would mean URLs like /tags/[tag-1]/[tag-2]/..., or nested tags, which would mean /tags/[parent-tag]/[child-level1]/[child-level2]/...

Actually, I use nested tags a lot, and it's not good to limit them. Or did I misunderstand you?

Yes, you misunderstood me.

Sure hope this ticket is still open and of relatively high priority.

What I am seeing with Parent/Child tags (v5.4.2) is that in the Publishing tab of an article, not all child tags are listed. For instance, I have around 20 tags in a group named "Methods" and only a random 4 of them show up in the dropdown list. Aren't all existing tags supposed to be shown when you click in that field? If I type "Methods", all child tags then appear. But the problem with this is when you have a lot of tags (which this site does!) you have to remember the parent or child tag name. And if the tag is a child, you type it but you don't notice it is shown as parent/child and you press Enter, you create a new top-level tag with that name that is already a child. The list should be complete upon clicking!

Correction to the above: All of them show up, just not together as a "group" having the same parent. That's very non-intuitive. Oh, and that is in AJAX tag entry mode. In Nested mode, yes they are nested and in alphabetical order, but if you type a parent tag name in that mode, you don't see any of its child tags.