'Add all open tabs to collection' option is gone; when you right click on a tab it used to be at the bottom? Help?

This is indescribably dumb of Microsoft. For no reason, REMOVE a useful feature. Who do they think they are, Apple?

Not defending them, but I suppose Microsoft would rather you used Tab Groups and then pin those if you want to save a bunch of pages. Collections was probably created for a slightly different purpose than just saving your current pages.

I used the feature loads too, but at least for me, saving tabs into groups and having those pinned is all I need. If I want to keep something more permanently, I would use Favourites.

No, collections was created for the purpose of saving everything\anything you have open and just was expanded to be able to add more. The function of addinf any and all open tabs to collections is listed and detailed by Microsoft. It is a bug that for some is only remedied by logging out of your Microsoft account.

Yes, this feature is still broken on my Edge. What is going on at Microsoft these days...

I have the same problem and can't find a permanent fix. But I got a workaround. You will have to go to Settings -> Profiles -> Sign out and sign in again. At that point, you will granted ONE "use" of "Add all tabs to collection" feature. And you can repeat this process over and over again when you ran out of use. This takes only around 5-10s but it's kind of a nuisance having to repeat this multiple times.